I disagree that “all” the others are just gambling schemes. Many are but some do have legitimate technology and value behind them. For example, XRP is rapidly becoming the largest way to transfer remittances around the world. Its far cheaper and faster than Western Union or Moneygram for example.
Other projects like Cardano are currently being used for a range of purposes from recording academic information to smart contracts, sending/receiving money, etc. Its also proof of state rather than Ethereum’s proof of work so if this particular technology turns out to be the way to go....
I also think other Tier 1 cryptos like Cosmos, Avalanche and Polkadot are also pretty sound investments.
Only BTC, ETH and SOL are proven successful. No more than you can count on two hands. There less than One in every thousand.
In this thread to argue for unestablished hopeful adoption of blockchain crypto does more to prove every nansayer correct.
Only BTC is an achnowlwdged asset. Evertything but BTC is speculation.