Most people will avoid risky investment , people will use currency that have stable value
Goverment support !
When goverment made bitcoin as legal currency , bitcoin usage will increase ( for public and for personal usage )
To be honest both of the above mentioned things are NEVER going to happen to bitcoin.
Value will not become stable simply because the sheer number of traders of bitcoin are too many and there is always the regular pumping and dumping occurring that makes prices volatile.
Governments are actually against bitcoin. Many country governments have already banned bitcoin. SImply because the banks help taxation which is a good source of income of the government. It is good but bitcoin being decentralized, there is no one to regulate taxes like that until some enforcing is done in the proper place.