I think the main factor of the government that helps the development of bitcoin is that currently it is not so badly prohibited from using it, even though it is not a means of payment. at least bitcoin is in the market, which is parallel to stocks, even many investors leave stocks to switch to crypto currency
That is a factor however if we begin to think about this and we imagine the opposite scenario, what would happened if they actually made bitcoin illegal? Will this stop people from using it? I doubt it, the price will go down for sure and many people will lose money and get scared but bitcoin as a concept will still be alive and well and if anything it will become more of a currency as people will use it to exchange products and services instead of being an asset which people trade which is its more popular use today.
This happens before wher many countries banned Crypto in it's earlier days. The price keeps dropping whenever there are countries who said to ban the use of crypto like exchanges as well it's implementation. But later on when Singapore, Japan and other developed countries uses crypto in their government banning seems gone and it's okay to use that makes more of adoption. Well government do really helps by not doing anything on it like stopping the banning and just letting their people use it as well by authorising some organisations to conduct crypto related work.