1. I'll increase the Bitcoin supply to be pegged at possibly 30million and the date for the last mining will still be 2140.
I think 21M is just enough.
It is not really at 21M right now since there are some bitcoins that are lost or stuck in a wallet that no one knows the code is to be moved. The lower the amount is, the better for its value and I think that is enough.
2. Adjusting the Bitcoin Halving. The Bitcoin Halving is currently in every four years were the reward of miners is halved. I'll now adjust make it every 8years.
I think that would make it worse.
You are making the gap of these halving longer means more miners will be able to get Bitcoin before the next halving. Despite the additional 9 million, I don't think that would really help there. Satoshi Nakamoto is a genius, just think of it, no one really knows if people will really use it but despite that, he made it better so it would be programmed to be used until the future, the devs might misunderstand but I am talking about the halving.