1.Crypto isn't a company, it's tech, and tech moves at a completely different speed than usual markets. Think of young models, once they show enough age, photographers move onto the next young ones.
2.I'd say the internet is growing, so finding a top 5 coin to store value is a great idea, but definitely don't think in those time frames. What we are seeing right now are the MVPs of crypto technology. 10 years down the line, some interesting stuff will be around that will make today's tech (blockchain and DAG) look like a little bitch.
3.You are talking to different types of investors all at once. A good organized way would be:

Day traders - will make money.
Swing traders - with good risk management will make the best money.
Long term holders - with picking a top 5 coin today, you're good.