I wouldn't invest in any of those three. Bitcoin you won't get rich holding it unless you are already rich. Ethereum is a dead end; they don't even have L1 transaction sharding in their roadmap so the chain will bloat again if it gets any use and we will be back to paying 500 dollars in gas fees for 5 dollar NFTs. Solana? LOL, it's been down what, 12 times now? I suggest looking into ICP and XRP, both of these will become the new standards for internet and finance.