Heaps of examples in equities. Check out the Fortescue Metals share price (FMG.AX) back when they first found iron ore in about 2006 and compare it to now (taking share splits into consideration. 20x return within a pretty short period of time. In NZ one of Howard Paterson's listings Blis Technologies went from 10c to $2 on the first day of listing - I owned it however I can't even remember now if it was in the primary or secondary board. Turned out to be a complete dud however that didn't stop everyone making 2000% return in 24 hours. a2 Milk this year has done very well and is now one of the largest market cap stocks on the NZX.
Can the average person buy in with $100?