Funny thing is, most Coinbase or Kraken or Binance transactions of BTC and Ethereum are simple SQL transactions in a normal database.

An immutable ledger to put information is the best invention since sliced bread, and that can only be achieved by an underlying economic system to maintain such a ledger.

That being said, probably all crypto (except one) will go to zero very soon. Crypto is a bubble, but it doesn't mean that the underlying technology is useless.