I don't care if Sol is good long term or short although Sol looks good and a promising project doesn't mean you have to do the stupid thing to sell bitcoin and ethereum to buy the clear and proven Sol both are kings and queens in the crypto market and the best of all time .
if you are interested in Sol, you can do so by buying it without having to sacrifice bitcoin and ethereum for other coins although it is potentially profitable.
Maybe he's just following Solana's development and doesn't care about ethereum and bitcoin or he's just interested in Solana.
I also disagree if selling Bitcoin and ethereum just to buy newly released Coins and booming in the near future. after that it is possible that the value and price will continue to decline, but ethereum and bitcoin will still coexist as a POPULAR digital currency
he follows the trend created by Solo. many projects were successful and had tremendous price increases. Of course, it caught the attention of many traders and investors.
but selling bitcoin and ethereum for SOL I don't think I would. but if you want to trade on the SOL market, I think selling some for trading and still keeping BTC and ETH as main investment assets is not a bad choice.