I advise you to invest by buying ETH, XRP, LTC, BNB, EOS, XLM.
I think those coins really have very good prospects for next year. With the daily transaction volume which is stable until now and continues to survive in the top 10 coin marketcaps. The owners of the coins also continue to develop their platforms. Each of them has its own advantages. You can learn it one by one to be more confident.
Good choose altcoin for investing with ETH, XRP, LTC, BNB, EOS, and XLM because I think is the best altcoin assets for the future, you can invest only with altcoin above because top position coin marketcap and price always higher on the future, the altcoin above team look serious want to make coin become potential at the future and have higher price.