The government has been fighting so hard already to regulate bitcoin; other altcoins can't except the regulation; they will definitely be regulated some day; that's for those that are not under any regulatory already.
 
The only way that the government can regulate bitcoin, which is still not possible, is if everyone who is a bitcoin holder and those who are to come into the market decide to use a centralised system both for their buying and storing of the coin, which in turn means the government is going to use those centralised exchanges, custodial platforms, or whatever they call them, to hold down people's bitcoin.
 
Aside from that, bitcoin doesn't create room for it to be controlled by any government body or add restrictions to it; they can only limit their citizens from investing in it, but it won't entirely work that way as people will always have means to acquire it, even in restricted areas.
 
But for alt-cons, regulation is possible as the team behind those projects will be sanctioned like the SEC is doing right now, and they can impose some unfavourable rules on them that holders won't know that the government is in control of their holdings.