Reuters/Lucas Jackson Bitcoin fell over 10% on Thursday as cryptocurrency traders cashed in on their Bitcoin holdings that have gained 20% in value this month alone. The digital token looked set to hit a record high of $20,000 this week.After such a swift rally, traders said a number of large investors booked profits on their holdings — many of which may have been moved to exchanges to secure a better price."It feels more and more like we're hitting a Bitcoin tipping point," a crypto trader said.