Anyone who is hurt/affected by this tweet because Elon says so that bitcoin is BS is totally biased, what he says is actually, somewhat, true. For example, when sending bitcoin that costs $$ just for fees which probably will mark to anyone who will just try accepting and sending bitcoin.
When it comes to fee issues or talks then we cant really deny that Bitcoin is really on that downward view or impression towards it because if we do try to compare against fiat payment fees then we would really able to tell the difference but the truth that we cant just ignore that Bitcoin does have advantage on several angles.
When it comes to sentiments came from those people then its not something to be shock on because those could either be positive or negative from time to time.
People who had been expecting too much from Musk would definitely get stressed nor shocked on what he had mentioned out about BS thing.