Whenever I want to FOMO buy something that's gone way up, it's always a good idea to check out the acceleration of the advance.
An easy way to do this is to use rays to draw trendlines. If the trend has accelerated without retesting, forcing you to draw a new one, then that generally reflects instability. The more rays you have to draw, the more unstable price is.
My rule of thumb is don't buy anything after more than 3 accelerations. (green, yellow, red). If price trend is at 4 or more, start looking for shorts. Especially if you can see declining volume on the rise - then demand is weakening.
In this case there's major resistance at the red dotted line. That's where I'll close my longs and start shorting. If we get there...
Trade is invalidated if price closes above the red line, preferably with some volume.
PS - learned this from djthistle01, you should follow him.