Before deciding to invest in crypto currency I think this article can help you to know about the risk involve
https://www.entrepreneur.com/article/339935 .
And here is the list of ideas you can do in crypto investing.
1. Hodling - any crypto currency you think is good to hold even bitcoin for long term .
2. Mining - mine your favorite currency can also give you income
3. Lending - there are many website you can do this even here in this forum you can lend your money to other user's
4. - invest in gambling -some popular gambling sites now open for investors to invest in the sites bankroll
5 - trading - You can earn 1%- 10% in daily trading depends on how good your skills are in trading.
6. Masternodes - you can earn passive income in Coins like dash ,but the problem about this is the price of the currency is volatile the price of the coins you are staking is different the day you buy it and the day you earn from master nodes.
Its just a suggestions every investment have risk that you should know before deciding to invest your money.