So here's a question, and I'll use the example in an earlier post of having $400 to invest.

Looking solely at return on investment, in order to double my money would it make more sense to:


a)  invest $400 in Bitcoin and wait for Bitcoin to increase in value by another $400,

or

b) invest $400 in Rimbit and wait for Rimbit to increase in value by ONE cent?


In both (a) and (b), the end result would be a gain of $400, but I'm wondering which would be the better bet.