What I think?

What I think is that you are incredibly naive. "Trillions" of a currency doesn't even begin to cover the cost of a hypothetical superluminal propulsion method. Mostly because current scientific thought is along the lines of "FTL=impossible". Einstein's a spoilsport, news at 11.

You're also being naive in assuming that we need to find some other Earth-like planet, and the idea that we would need to start doing this *now* when Earth is going to last for plenty of time- if and when we reach the point that Earth is no longer a viable residence, then it won't actually matter- not for the current and near-to-mid-future generations, because we won't be around when it happens, and not for far-future (IE several millenia [1000s of years] down the line) generations because they will likely have the technology to nullify any possible disadvantages to whatever solution is decided upon.

Further, the most optimal choice would actually be to pursue vigorous mass-living in space- likely Earth or Near-Earth orbit(s). After all, I'd wager that by the time it matters [at minimum several centuries in the future], we'll have developed sufficient space technology that we'll easily be able to construct numerous orbital habitats.

Also, you should really consider your definition of "efficient space travel". We already have some varieties of it- it's fuel/remass efficient, but by far isn't time efficient.

Well, we would at the very least need antimatter. I am just basing that on the necessary energy levels needed are astronomical and antimatter is the most powerful source of energy we currently are stockpiling. At the very least, an Ion Drive powered by Antimatter would get us far enough away from earth where we can start researching more powerful energy. Fusion power would be nice too, but we won't likely have one that fits in a spaceship until 2150 or so. 

This is mostly generalized conjecture, but still makes a good point I think.

Right, because to get to should we, we need to have could we in the conversation. I say that the energy spent on could negates the practicality of doing it. So no, we should not. We should sustain this planet until we can get FTL at a reasonable speed and cost. Of course we will make an FTL drive eventually. At the present though, we should not pursue it.

planet will not last forever and the same for our sun... but we don't need FTL for go to other star with other planet, FTL can only be useful if we plan to return on earth when a short time have pass on earth...

"How far can one travel from the Earth?

Since one can not travel faster than light, one might conclude that a human can never travel further from Earth than 40 light years, if the traveler is active between the age of 20 and 60. One would easily think that a traveller would never be able to reach more than the very few solar systems which exist within the limit of 20-40 light years from the earth. But that would be a mistaken conclusion. Because of time dilation, he can travel thousands of light years during his 40 active years. If the spaceship accelerates at a constant 1g, he will after a little less than a year (mathematically) reach almost the speed of light, but time dilation will increase his life span to thousands of years, seen from the reference system of the Solar System, but his subjective lifespan will not thereby change. If he returns to Earth he will land thousands of years into its future. Even if he should accelerate for a longer period, his speed will not be seen as higher than the speed of light by observers on Earth, and he will not measure his speed as being higher than the speed of light. This is because he will see a length contraction of the universe in his direction of travel. And during the journey, people on Earth will experience much more time than he does. So, although his (ordinary) speed cannot exceed c, his four-velocity (distance as seen by Earth divided by his proper (i.e. subjective) time) can be much greater than c. This is similar to the fact that a muon can travel much further than c times its half-life (when at rest), if it is traveling close to c."

Now, if you have plenty of money, by example the money who will be used for create a FTL... put it in some bank account with good interest... flight away from earth for almost 6 month at near the speed of light and come back... a lot of year will have pass on earth and you will be able to cash out a lot of interest money...

I want to be a space pirate.

what makes you think you can get someone to live on a ship for 40 years without having them kill themselves off? and if you can do that, then there's no reason why it won't be one of them generation ship thing, where generations live and die on the ship for no purpose other than some descendant get to the other side.

even if you can get a drive built tomorrow, it'll just be a lump of junk fit for nothing more than a robot probe.

LOL, transcendence requires much higher technology than an FTL drive. What science book are you reading? 

This thread is hilarious.

Fuck that, I want to be a proud Moonmanian!

Tasunke was that an Event Horizon reference?

(for the sake of discussion let's assume we could develop something like FTL) As much as I love everything to do with space, a project like this would probably require a level of global cooperation that is hard to imagine in our time. I'm not a huge Star Trek knowledge database, but I think the fact that there is a Human Federation (Preceded by a united Earth Government: United Earth) with the Prime Directives is essential, before you could have effective space technology. Otherwise, issues of cost, ownership and usage of the technology will just drive a wedge between the traditional powers of the 21st Century and very little would be accomplished. Even if there was a huge technological advance, this could actually cause a great deal of tension and potential conflict over governing it.

There would likely need to be some sort of cataclysmic event that would unite humanity to such a degree. In the Star Trek universe, there is a World War 3 prior to the creation of Warp technology and a united World government, for example. Sorry to keep using Star Trek, but it just fit well.

I don't think a war is needed. Greed will fuel our expansion as it always has. I think Firefly gives a much more likely prediction of how it might look. Corporations are the future of most interstellar ventures. Blue Sun Corp. FTW!

Short answer: NO

Wait for aliens to show up with the technology, kick their asses and take it.