The time will tell whoever thought bitcoin was a bubble. These people just spread FUD and have no proper knowledge. They just to create negativity among others. But they are underestimating the power of bitcoin. Its a matter of time and bitcoin will prove them wrong.
I believe that people who are saying bitcoin is bubble regret why they didn't invest. Bitcoins value reach its peak in 2017 and I believe that it will surpass its peak and will increase higher than the 2017 value. Bitcoin have done proving them they are wrong and bitcoin will prove it more in the next few years.