Bitcoin price gained momentum after it settled above the USD 40,000 resistance. As a result, BTC broke the USD 42,000 and USD 43,500 resistance levels. It is currently (04:30 UTC) correcting lower, but the bulls might remain active near USD 43,000 too.
Similarly, most major altcoins are also correcting gains. This past weekend, ETH outperformed bitcoin and it broke the USD 3,000 resistance zone.