Two questions

Hi, I have two questions regarding Bitcoin:

1. Mining Bitcoin is less and less worthwhile as the price decreases. I assume many mining companies will go bankrupt if the situation doesn't change. Therefore, biggest mining farms will be able to buy cheaper equiments and gain more power. Wouldn't this raise a decentralisation problem?
2. People seem very confident that the price will increase during the halving in 2024. But in the end, only strong demand is the only thing that matters. What incentivises people to buy Bitcoin in 2024 rather than now?