I think bitcoin will cost more than$ 50,000 in 10 years. Also, it will no longer be the first cryptocurrency for capitalization. Ethereum will take its place because Ethereum has a working economic model. It's not just" digital gold " like bitcoin.
In my own prediction, bitcoin will still be the number one crypto-currency and is widely accepted by different countries around the globe as a way of payment and a good store of value. After 5 years, bitcoin price will be at 30k to 50KUSD. Hope that it will happen soon.