We had many bitcoin steam individual resellers and big services like G2A offering Steam games for btc in the past.
And they are going to stay, nothing is gonna change because these they are usually offering lower prices for games that Steam.
Buying games from Steam directly is only advised if:
1. You can't find the game you want anywhere else. (very unlikely)
2. There is Steam Sale going on.
Even then you should not directly put BTC into steam. Steam wallet funds are worth less than paypal/BTC so you can get like 10-20% off.
For example, you can buy CS:GO keys for around 1.9 to 2$ in BTC and sell them on the community market for around 2.5$. Or buy skins from bitskins.com too.