Bitcoins are been regulating with a super speed since the time they were launched being as a volatile currency. Bitcoins are a great source of investment/trading for a majority of peoples and they can only have profits out of trading bitcoins if the price remains volatile. If the Bitcoin markets get stable than there would a decrease in the amount of trading which would also deduct the demand for bitcoins which indeed won't be expected as the prices would start downreaching.
I personally, don't want to see bitcoin markets getting stable. Volatile markets keeps the cryptocurrencies a way different from the centralised currencies having stable markets.