This can only mean that the prices will go up and everyone will be fighting neck to neck to get their hands into some satoshi. Hopefully, they can solve this problem with their buy orders.
Not necessarily. Take note that this is only eToro; don't get me wrong, it's a huge platform, it's merely one platform. I'd say bitcoin will be almost guaranteed to go up probably(we're talking about the short term btw) if a good number of platforms has this sell-side liquidity problem.
Exactly, this is just one platform, but I've seen news that even Coinbase is running short of bitcoin though because of the huge demand. And that's why recently the price really spike, but now the liquidity is somewhat there as we have seen corrections. In any case, there is a lot of wild and educated guess that we can hit 6 digit this year so maybe we will more of this kind limitations on all crypto related services.