400k is possible only if amazon, tesla, louis vuitton, big banks and other huge/rich companies, started to accept bitcoin. But that would happen for many years considering the fomo, even 50k is too hsrd to reach right now.
There will come a time that the exponential growth will slow down. And now that we have seen institutions and big companies entering the market, we can only say that the push is about $40,000 currently. So that will be like x10 to get to $400k, so more money is really needs. I would say that if there is a complete flip from gold bugs, we might see
BTC = 6 digits in the future.
$50,000 though is very easy to hit, as we might get there this year alone. But 6 digits or even more will be harder.
Hit on $50,000 become easy but when bitcoin down need waiting again for several week or months, I believe bitcoin could on higher price bit need progress and not instantly bitcoin hit above $400,000. Maybe although any companies have joined and invested on bitcoin keep time for bitcoin raise to higher price how ever bigger companies joined with bitcoin will give bead effect when their assets sell you know how bitcoin price dump, better take time and waiting day by day how bitcoin price will above $50,000 few days later or bitcoin keep on under $40,000.