Giant ponzis do not run for more than 10 years. At $600,000,000,000 invested in Bitcoin the money supply has dried up. Bitcoin has crashed from $20,000 to $12,000
and high profile people calling Bitcoin a giant scam there is ever increasing risk of international police raiding Bitcoin mines
I do not think that bitcoins will be decreasing up to $400 dollar, because there are still people today who are interested on cryptocurrency, bitcoin might go down to $400 dollar if people will reject cryptocurrency and prefer to use fiat.