Probably just holding BTC will yield better gains.

Can't imagine the "ether" being so in demand that you'd ever get your investment back. People can just mine it, and if there are going to be demand for ether (other than speculation), it won't be immediately at the beginning, it will be later when mining has already diluted the presale investments.

It's still at least 6 months away, could be 12 months. Nxt, NEM, BlackHalo, Syscoin, etc are already here, and who knows what they can do before ethereum even goes live. Bitcoin itself might skyrocket, and that doesn't mean ethereum's value is tied to bitcoin's.

Apparently a lot of people disagree though, as after only few hours, there have already been 1900 BTC locked away for 6-12 months for ether.