Bitcoin (or bitcoinlike replacement) is the future and the most interesting thing to come out (Technologywise) since email, bittorent or social networks
They're essentially a monopolist.
Nobody else has what they have: access to nearly every country, worldwide.
A) People who are outside the US.
Let's compare that to the number of people who know what Bitcoin is.
in the long run (10 years) either bitcoin or bitcoinlike replacement is going to trash Paypal in same manner that Linux, android etc is trashing Microsoft now, yes Microsoft still make billions but bitcoin is growing rapidly, many people wrote off Linux years ago too for very similar sounding reasons.