"As a rough rule of thumb never invest more than 5% of your capital in any one company or you will lose in the long run even when the odds are in your favour."
Say that to Bill Gates or just about any founder of a successful business. In the beginning almost everyone of them invested WAY more than 5% of their total capital at the time. You don't get wealthy plodding along like sheep. You get wealthy by going in hard and being right!