I would personally recommend mainstream coins like ethereum and bitcoin, and also i like NEO, Ripple, waves, because i think by the end of this year they should increase in price and they are rather stable coins.
i suggest it will be better if you buy or invest in bitcoin because bitcoin has generally increased in value at a very fast pace, followed by a slow, steady downfall until it stabilizes. before investing in any cryptocurrency its important to understand how Bitcoin works before investing any money. it will help you if you to have an idea or read about bitcoin forum or do a research.