it will never come don't expect it. it would be more real if you say $1000 in 2020. I think that $1000 will be the stable price of bitcoin and it will never grow . it will drop back down but it wont grow more than $1000 per bitcoin. if that happens the owner or the creator of the bitcoin could buy a country lol remember that the creator of bitcoin has a 100million bitcoins on his accounts so if you're thinking about $50000 per bitcoin that will never happen.