I think Sztorc's opinion there is of course directed to those that say that Bitcoin is "outdated" and there will be a "flippening", and in this case I somewhat agree.
alot of people think blockchain currency units are created at no cost and so the market can speculate down to zero.. much is true for PoS coins and other silly meme tokens. however bitcoin does have major cost of block/coin creation cost. the hashrate/difficulty vs mining cost gives bitcoin units real underlying creation cost value which the markets then speculate above, preventing it from going to complete zero(unless the hashrate/difficulty dropped)
for there to be a flippening where another network takes the top spot, it requires some real underlying cost security, meaning that a currency needs to push itself above the underlying cost of bitcoin or bitcoin loses a substantial amount of hashrate/difficulty to drop its underlying cost
currently ethereums cost of creation dropped by 95% when it changed to PoS and is only being held up speculatively by its conversion to bitcoin where traders on the bitcoin side are manipulating the ethereum price to keep ethereum speculative high compared to its cost value.
in short ethereum has alot more chances of crashing to near zero compared to bitcoin because its only due to bitcoin that ethereum is being held up so high