When I first heard of bitcoin, it was worth pennies. When I first seriously considered buying some, it was worth about $20, and I thought I'd missed the boat, and didn't bother. By the time I ended up buying in, it was worth $900 - less than half of the current price (profit for me, but sooo much less than if I'd got in when I thought about it before).

The fact is, nobody knows what'll happen with ETH. Do your research and don't put all your eggs in one basket, that's my advice!