If you really want invest in coin and wait 5-10 years you should choose only the most surest coin from top 10 on list. Because waiting this long time will be risky, so to minimalize risky you must choose something the best.
I can propose you bitcoin, ethereum neo, or other coins from top 10
You are right, if in the long term, it is better to invest in the top crypto-currencies, because I have already lost a lot of coins in the hope of earning a lot of x's.