This is what my problem is - I simply don't have 100BTC to park. Most of these small ForEx brokers I've seen usually only need $100 to open an account. While that's probably enough to ensure that the customer will lose it all, I'm not sure that 10X that is necessary to ensure the customer doesn't lose everything in a heartbeat.
First of all leverage doesn't have any influence on risk, it will just reduce the margin required to open a position allowing you to open more trades to diversify or hedge your trading positions.
What is important it's the
size of your trade, roughly to do 1 lot you need at least 1000 btc and for the min position size of 0.01 you need theoretically 10 btc but if you aren't good enough is still too low as a starting deposit.
I don't think that for an amateur 25 btc are enough to cover the max initial equity drawdown that you'll probably have. Maybe 50 btcs are enough to operate with a position size of 0.01-0.02 Lot but as Kako said there are technical limitation to go under 100 btc.
If you think to be skilled enough, find 3 guys that are willing to give you 75 btcs and manage that sum for them.