Which crypto should I buy

Not familiar with VRA so won't comment there but wouldn't touch the other two. Cummies already had its pump, and others shifted their attention to other similar projects like Erotica and other sex projects. ADA would be a no for me, personally. They are tardy with bringing smart contracts (programmability) to the chain which puts them at a serious disadvantage in terms of projects actually building on there. The truth is that most of the eth killers will descend into irrelevancy - it's happened before and it will happen again. Wouldn't touch most of them with all of the Eth catalysts coming too (EIP 1559, Scaling solutions, Eth 2, etc).  The only alternative chains you should be paying attention to are the centralized chains (BNB & SOL) and the ones not directly competing with Eth (DOT & COSMOS), will probably add that FTM is a good one to consider as well.

Also re comment: bull market is over. The truth is no one knows. Some are predicting that things could kick off again as early as this summer with all of the Eth catalysts I mentioned. Some are saying the next leg up will start in the Fall. Others are of course saying that this is the typical multiyear bear market. Bottom line: there is no consensus and nobody knows for sure. I also don't subscribe to that nonsense that you should just pick btc because it won't drop 75-90% in a bear market like alt coins. If you are interested in making a good sum from this (which I assume you are), you should ignore this advice. What you really want to be doing, if this is a bear market, is researching and buying the bottom of the few good opportunities out there. There were people who bought alts like Rune during the March 2020 crash and were up 100x exactly a year later and almost 300x by April. There are more examples, like Luna, of other good alts doing similar numbers too. Best advice is to have money on the sidelines, follow the macro picture of the market and proceed accordingly.