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.
Anything that stay in the internet will be call digital.. So yeah bitcoin and the others cryptos will be call digital asset or currency that has valued on it. What is the best is bitcoin are decentralized coin so everybody are freely to use it as long as you have bitcoin inside your wallet without to worry about tax and the government as they cannot trace the money from bitcoin hash.