I haven't said anything about a "crash" but something like a test of $660 is entirely possible.
It is, and most likely will be visited in the next 1-3 weeks, if there is one thing i have learned is that "it always goes up. And than down. And than up". Except when it does not anymore (i mean here the down side), there is literally no chance to ever get a two digit price anymore, ever.
Why? Cause i would rather get a bank loan on my house than let 200> btc "unbought", and many people would do the same, hence there will be no 2 digit bitcoins, ever again.
$660 is close, yet, 2013 was a long time ago, at least 10x-100x more people want to get in/looking for ways to get in, any run up to the previous ATH will be an absolute psychological catalyst for mass investor FOMO hysteria, propelling the prices to several 4 digits areas least, and way too much institutional investment to let the price ever fall below 4 digits, like ever again, just as we know we won't see - NEVER - 2 digits anymore.
No idea, when the present bullish sentiment ends, $660 is totally possible (i hope so, i wanna buy in more at that price!) for a few weeks, maybe 2-3 months sideways at max, but after 8 years since Genesis block, there are roadblocks.
If we hit ATH again, it won't play out as last time, especially without Willy - aka, a slow bleed back to 2x price before the run up. Things has changed.