Using Bitcoin to pay employees' salaries shows the government's recognition of Bitcoin, which has a positive impact on the development of Bitcoin.
When employees obtain Bitcoin, they will trade in their daily lives, increase the circulation of Bitcoin in the market, and make more and more people aware of Bitcoin, which is conducive to the future development of Bitcoin.
They also have the choice not to trade those salaries that they receive. I've read some interviews that the guy was being paid with bitcoin and he doesn't want to spend it.
But as much as he can, he's saving bitcoin because he knows the true potential of it. He's just a common guy but still aware of the risk and the volatility of bitcoin has.