I understand, that now is not March, but situation did not change drammaticaly.
You have to buy alts depending on your targets.
If you want to choose safe way of investment you can buy big coins such as ETH or VeChain and hold them, it will bring you something in the future.
But the second way is to buy undervalued coin, which can bring you much more profit, for example Remme. Very interesting technology, which makes sence now, as everybody uses computer and this project rebuilds authorization (login) system and makes it secure and easy to use. Moreover, this coin now really undervalued and it is on 500+ place of coinmarketcap.
Good luck!