Please don't forget to declare your initial bankroll so I can register you for the competition.

As for you question, is like u9y42 said, you don't need to deposit anything. That value is only used to calculate your ROI%, and you 5% max bet, so you can declare any value. You don't even need to have that total ammount with you, so you can declare 1 BTC if you want to get triple prizes.
Just remember that you must feel confotable in betting 5% of your bank if you ever need to.

I'm sorry but did not understand your suggestion Joca. What bonus and what do you mean by the end of the years? You are suggesting a bonus for a overall profit for determined number of competitions?