That will actually depend on your budget. If you have such a huge money then go for monero like coins that are a bit expensive now. But if you have a low budget, I would recommend you to buy coins like waves, stratis, and especially bytecoin.
WHat is the logic?
If person has a small budged, why should he/she buy waves or bytecoin?
These coins are quite big already, it is better to buy something new, small but perspective, because it can bring much more money.
Author, look at Remme, nice project, which can be really used in the future for authoresation in different online services.