Thing is Buffet is a man that can move markets just on his comments or buying into funds / shares.
Carl Icahn has an ever bigger effect for that matter.
Backing it back up to Warren Buffet, say what you will but since he bought Berkshire and turned it into an investment vehicle he did manage to get 20.8% average return over all the years (his gains were higher when he was still managing the Buffet family fund though, but I digress). Although in most recent years it will have become much harder for him to realize this, since he has to much money to move. However, having that much money also gets you 'insider' deals so you're able to buy stock lower than any regular investor might be able to through the stock exchange.
Warren, and Charlie Munger (who might argually be the smarter of the two, but that's not related to any of this
), have a very strict set of 'rules' by which they do their business. Warren indeed sticks to his rules to "invest in what he knows", because he does deep fundamental analysis of companies. Even if they are out of public favor now, if they have a good set of fundementals (healthy balance sheet, low amount of debts, market dominance, knowledgeable C-level execs,...) he'll invest in them. Even if that means that his investment won't pay of within the first 2-5 years. That's the power of value investing. I've been doing it, and with succes
. Warren is a master at business, minimizing risk and maximizing upwards potential.
However, crypto is a whole other game. It's much more related to forex trading than stock trading and the volatility is higher than what Warren would feel comfortable with. For the most part it's also a very short/medium term game. It's hard to do fundamental analysis (nobody knows where all of this is going really). Just as a side note I wanted to throw in a comparison between the net worth difference of forex trader George Soros, worth about 8 Billion and Warren Buffert, worth 88 Billion. In my observation there are more "ultra" wealthy value/stock investors than there are forex traders.
My tip: make sure to capitalize on your gains in crypto, and move them to more long term (less volatile) investments. Don't put/leave all your money in a single stream of revenue.
Apart from that Warren (most likely) has no interest in diving into the crypto market now. He's old as f* and has already acquired more than enough money. He isn't interested in learning the crypto world anymore at this age in time or this stage of life, and I don't think he should either.
For us, "youngsters", crypto and the blockchain technology will undoubtedly shape the future world, much like the internet did decades ago.
I behold Warren (and even more so Charlie Munger) as a mentor of mine, but the biggest thing he taught me is to do my proper research and adhere to strict principles when it comes to investing. Your emotions are your worst enemy. 
