Cryptocurrency is a decentralized digital money, unlike the one we using on banks which is a centralized digital money.
Digital asset is different from crypto i think. When you think about asset, it is different from money, meanwhile cryptocurrency is a currency, same with USD or EUR or any other currency.
that doesn't matter whether it's centralized or decentralized but crypto can always be called as the digital asset and there was no different with crypto since crypto was in the digital form too. if you are aware about digital yuan and it's very similar to the stale coin too. I think that you misunderstand about this.