Since the bitcoin price has increased that much i think the minimum reward point conversion to bitcoin should also be reduced. I have currently 50000 Reward points and reaching 100000 Reward point may take another one year for me.

I think that you should gamble more to get to 100,000 quicker.
We give a kickback of 1 RP for every 500 Sats you wager. The ability to encash 100,000 RP for Bitcoin was always intended to be for gamblers and people who introduce a large number of referrals. The other RP bonuses are intended as a way that everyone else can convert their RP into Bitcoin.