I have around 2k USD of btc and I wanted to swap it for something but I can't decide whether to buy eth or Solana both seem extremely promising in the far future.
Both are good coins but Bitcoin is the best one. I am wondering why you are converting the Bitcoins to alts. Bitcoins are limited in number and hence have high potential to grow more in the future, but still in order to get short term profit you want to switch to alts? Nevertheless I don’t want to advise you more. If you really want to choose between ETH and Solana, then go for ETH. Its marketcap is high and hence less chances for losses.