He means below 100$ surely ?

Doesn't make sense though. 10K$ might happen if some major event causes it, like a big whale getting arrested and the authorities getting the coins, something like that.

100$, that would be another kind of major : a successful attack on BTC, killing it. Buying at that price wouldn't make sense then, as it would be worthless, in fact you wouldn't even know if you were really getting the coins you would be buying.