Although the big companies are accepting cryptocurrency as payment, if the government still not approve, then they could not apply cryptocurrency. The important thing is we need approval from the government so the big companies can be free to use cryptocurrency as their payment option. Besides that, if the government can approve cryptocurrency, people will use and know about cryptocurrency, and if that happens, then we will going to see the growth of cryptocurrency in real life.
But with the rapid development of crypto currencies, the government may change their policies to accommodate the changed eras. As an example, in regard with the news of Libra Coins that will be launched in 2020, it could affect the government policy later.