The utility of crypto & blockchain

I’m relatively new to crypto, but I’ve done a lot of research on both blockchain technology and its potential use cases (RWA tokenization, DeFi, alternative to fiat in the case of Bitcoin, Web3, GPU compute decentralisation etc.)

So I was wondering what use cases excite you guys the most, and I don’t mind if you guys share the technical details of how the use case works too.

Also, how do you know which use case is the better one to invest in during a particular crypto cycle, and which ones are the best long term? So far, from what I’ve been reading, decentralised ledger technology is revolutionary.

And, how do you know which blockchain platforms are better. Ethereum has been the best so far for dApps that provide the greatest utility. Solana wanted to replace Ethereum but became a platform for memecoins, unfortunately.

Give some thoughts below.