About coinbase that canceled margin trading, it is not the only exchange that supported margin trading, I hope many people would have left for other exchanges that support margin trading.

You are right that the governments are tightning crypto regulation in general but no much pressure on crypto derivatives, I do not think there is much to be worried about, if a certain country governmental laws do not favour, there will be some other countries that will favour. About crypto derivatives like margin and future contracts, I do not think this can be affected, there will be many exchanges that will always be providing these services. Although, the KYC, AML and CTF of users using the exchanges can become mandatory in accordance to governmental policies, but this should not affect crypto derivatives.
 
We all know what most government are trying to do, but I do not think it is in relation to derivative trading because only few do not support crypto derivatives, but on regulation of how exchanges can know their customers in a way crypto criminals activities will decrease is the main issue, which will not affect crypto derivatives in my opinion.

There are some countries that do not like margin and future contract like USA while UK has being tough on crypto generally, but that does not mean is will affect crypto derivatives as many countries support it, only psuedonymity is what most want to avoid.