hide assets with a publicly traceable and immutable ledger? you'd have to be a complete idiot to try that. Bitcoin is useless as a store of value if everyone can see how much you hold, where you acquired it, and how you've spent it..
but yes, there are other (actual) cryptocurrencies* that don't broadcast every detail about your transactions, which can be used for that.
*crypto- comes from the Greek kryptós, meaning “hidden.”
2. https://www.getmonero.org/resources/developer-guides/
Or just join libera.chat (IRC) and hang in #monero-dev