Bitcoin metreoric rise last year had many obsevers calling at one of the biggest speculative manias in history.the cryptocurrency's 2018 crash may help cement its place in the bubble record books.

 Down 70 percent fro  it's December high after high sliding for fourth straight day on Friday,bitcoin is getting ever closer to matching 
Nasdaq composite index's 78 percent peak-to-trough plunge after the u.s. dot-com bubble burst.hundred of coin have gone out zero.

cryptocurrency buyers, but regulatory and security concerns have so far kept most big money managers on the sidelines.

Lesser-known tokens have been hit the hardest. Dead Coins lists around 800 that are effectively worth nothing, while Coinopsy puts the tally at more than 1,000. Fewer than 4 percent of coins with market caps from $50 million to $100 million were successful or promising, according to a March analysis from ICO advisory firm Satis Group.

Bitcoin may not go to zero, but it’s “very much” a bubble, Robert Shiller, the Nobel laureate economist whose warnings about dot-com mania proved prescient, said in an interview with Bloomberg Television’s Tom Keene on Tuesday.