This depends on the type of regulation that the government will impose in the future. If they implement strict rules and regulations including a reflection on the tax, this might stray the attention of investors and eventually following on its price in the market.
If they implement a feature wherein they support the growth and development of cryptocurrencies including a creation of job opportunities or an implementation of laws that is not prejudicial to its creation, then expect its price to increase.
Regulating Bitcoin will never be beneficiary to the Bitcoin ecosystem. It will rather present the opportunity for specific governing body to regulate the amount of Bitcoin in total circulation and also restrict people from sending huge amount of funds in Bitcoin. There will be an amount of Bitcoin people either sell or buy.
This depends but the outcome will most likely be like this. Regulation from the government has its benefits but it may cause damage to investors. The problem would stem from its limited supply if they attempt to regulate it like gold.