It's time for cryptocurrencies to implement strict regulations, the presence of regulations can convince investors to invest and avoid scam projects, nowadays many people use cryptocurrencies as a means of scam, so based on reports that cryptocurrencies are the second position for scams.
They can regulate but only into those coins which are centralized and those platforms involved which government could able to take hold because we know that not all coins does have that feature which could be controlled or simply centralized and that what makes the market does have division in between centralized and decentralized.
Speaking of regulating all crypto? It can't really be possible yet main supporters of crypto does give out importance about anonymity and being decentralized which they can't just able to control even if they wanted to.