I agree with you there are shitcoins. But there are assets that definitely not coins. The main purpose of these assets not to pay with them, but e.g. drive the Ethereum platform (eth gas), invest to a startup (ICO, many of them scams, it's unfortunately a fact), fundraise a DAO, using to sustain a service, facilitate transactions in different curremcies (Ripple's XLM), buy NFT and so on.

Despite of this you can trade with them e.g. in a crypto xchange.

But not to be comfused: not every crypto asset is a shitcoin because it is not bitcoin. I mean crypto asset (!) not coin. Ckim is only a part of all type of assets.

And about the tokenizig - you look clearly that the main part of these projects based on a "buzzword", there is no poimt to use blockchain, or similar. But for example in the IoT devices (see Iota)/it is essencial part (but it uses tangle instead of blockchain). Blockchain is probably gkkd solution ks the larties does not trust each other and there are many parties (that's why the blockchain is trustless solution).