Bitcoin works best in a long term thus, the good price we are seeing now may not be a sign of having a bull run. We all know that bitcoin can be very unpredictable we might see and incredible increase in the past few days but we really dont know whats gonna happen in the next few days.
It depends on the strategy you apply, but the least risky form is buy low sell high. If you have a long term time horizon, you will do well but it will take a lot of patience and dedication because of how irrational markets can be.
The bear market that followed after the 2013 bull run was exhausting and I'm sure a lot of people gave up on Bitcoin because of how long it took to get back above the ATH, which to some degree is understandable.
Bitcoin back then wasn't as fundamentally important as it is today, so currently it should be a whole lot easier to sit through bear markets and actually use that to accumulate as many coins as possible by applying dollar cost average.