Crypto is a technology and has many uses. Smart contracts, decentralized applications, DeFi, DAOs, NFTs. The blockchain is a secure way to record any transaction and will substitute the need for third trusted parties like lawyers, notaries, registries and so on.
If you only look at the price it might seem speculative but when you look at the fundamentals then you'll see they fix many problems no one has attempted before.
The unbanked, cheap fast secure peer to per transaction, remittances, storing value in a bullet proof way are just some uses cases for bitcoin.
Bitcoin as well as gold is a hedge against inflation and could well solve this problem forever.