His main Bullish invalidation is at $420.27 as is mine (the beginning of the minor wave-(1)).
My primary count of Bitcoin being in a Minor 2 wave down is actually valid down to the previous C-[Y] low at $339.79. Wave 2's can retrace all of the wave 1 move without breaking any EWave rules. More realistically, wave 2 should not retrace more than 88% of a wave 1. The 88% retrace of Minor 1 is $383.
By the chart, it looks like you'd expect some kind of a turn (preferably with volume) somewhere between 415 and 470?
And I'm guessing that you would not recommend trying to catch the bottom, but rather waiting until there is a clear turn with volume? Then maybe buying on the way back up, hopefully early, once indicators have turned?
I expect Minor 2 to reach the minute (c) = minute (a) target of 429, at least. I don't want to be giving trading advice, so you'll have to assess whether your position sizing allows for 'catching the bottom'. Enter trades with a plan based on price targets and you will be ahead of most traders and if you are just holding for the long term, consider buying in increments rather than buying all the same time.