First of all, do some investigation, research some coins and decide on your own wich projects have in your opinion are worth your money. Buy and HODL.
One should note that the Market is Volatile. it is unpredictable, But it is a good time to Buy Coins for investment. the price value is low, the market is on the correction after the down stream from the previous months. some expert follow this simple principle...BUY LOW and SELL HIGH..
If you will looked at their principle of buying low and sell high, I think it is not suitable in this current situation of crypto market, because just what like I did, I buy in the low period, and expecting for the price to go up before I sell, but now my investments dropped up to 70% already and still not recovering up to this moment, so I don't recommend to you to buy now that the market is falling.