You have a couple of ways to go about this if you want to act like a professional and not like a religious fanatic.

Method 1

- Trend following. You absolutely know that crypto has a tendency to have a small number of massive moonshot wins. You can make certain to get a piece of that by buying EVERY SINGLE coin of reasonable size that closes above a 50 day high. Most of them will lose but you will be guaranteed to get a chunk of every big winner. This is the best method IMO.

Method 2

- Momentum. Make a list of every coin of a minimum market cap. Then develop a ranking methodology and hold a portfolio of all of the strongest 10 coins (or another number). Redo this every week, or every month. Sell your losers to buy more strong coins.

Method 3 - Fundamental analysis. At least 50% of all ICO’s are pure fraud, wishful thinking, me-too cash ins, or out and out ponzi’s (BITCONNNEEEECT!)

If you weed out the idiotic ones and look at what’s left, you have tilted the odds in your favor. Because the big winners in crypto are 50x or 100x risk/reward, if you are right one time in 10 that's perfectly fine.