Incomparable story it is. You should not compare crypto with physically exist metal. Silver can not be accepted on every shop or between companies as a source of payment but Bitcoin is using. Bitcoin is far away different from silver and you can only compare the crypto with crypto but if look into crypto currencies there is no such currency that can be compared with Bitcoin. Bitcoin is unique in all proportions.
Silver was $80/ounce in 1980 when the "Hunt brothers" bought all the silver, it was total manipulation.
It was "traders cartel" that pushed Bitcoin to $20,000. The cartel was using unregulated and anonymous Bitcoin for illegal activities worth multi-billion dollars.
Bitcoin hitting $2,000 in 2018 is more likely