by 2020, the bitcoins will reach $10000 and used by everyone

why makes you think like that? Technology has been rapidly growing and also bitcoin has been. I think it is really possible for Bitcoin to be a mainstream mode of payment by 2022

bitcoin has potential to be that big. Think about diamond. It's a valuable item, just like bitcoin, and there is a hard cap of it, just like bitcoin.

Yes people who are using bitcoin will never leave it but the fact is people who have never heard about it will not use it as they need proper guidance from the present users of bitcoin.

No doubt, bitcoin will be known everywhere in the world, but I don't think that it will be used by many...The use of fiat still has an advantage over bitcoin..Remember, not everyone use internet and their computer all the time..

Those haters you mention is the devs and their supporters they are envy of bitcoin success they are making black propaganda to make bitcoin down but they never succeed and all i can say maybe all people knews how to use internet may use bitcoin for sure becausE for its potential to earn and can b e use for easy transaction

Bitcoin will be used mostly by younger people: maximum at 16-30 years, minimum at 50+ years.

it was 1200 back then and there were not a lot of people using it, in fact the % was even smaller than what it is now

adoption make the value not the opposite

There will be a higher number of people that will use bitcoin in the future but i doubt that it will be used by everyone, a higher price will simulate more people to join into the bitcoin world but not everyone will be by 2022.