Bitcoin’s coherence values appear noticeably less affected by bubble and non-bubble regimes, especially over short and medium terms (2–4, 4–8, 8–16 and 16–32). The non-bubble coherence values are similar to those of the other cryptocurrencies, but the bubble regime values do not reach a similar magnitude to the other cryptocurrencies.
It hasn't yet been recognised by the major cryptocurrency sites such as Coinbase but why did it get so popular?

“You have a high chance of losing it all, but a small chance of winning it big,” says Nate Nieri, a CFP with Modern Money Management in San Diego, California. “Don’t gamble an amount that would burden your family or prevent you from achieving your goals” if you lost it all, he says.
China announced in September that all cryptocurrency transactions in the country are illegal, effectively putting the brakes on any crypto-related activities within Chinese borders. In the U.S., things are less clear. Federal Reserve Chair Jerome Powell said recently that he has “no intention” of banning cryptocurrency in the U.S while Security and Exchange Commission Chairman Gary Gensler has consistently commented on both his own agency’s and the Commodity Futures Trading Commission’s role in policing the industry.