It brings more attention to bitcoin. Witch is always a good thing.
Well, you are right. Although the statement has been attributed with the recent slump of Bitcoin's price (which many actually doubted), the thing is that even a bad publicity can be working well for something good as Bitcoin. More people will be searching about Bitcoin because even the POTUS mentioned it on his tweet. In the end, we have to thank Trump for promoting Bitcoin for free. The dip is always a good opportunity to buy more, enter the crypto space or maybe convert alts into Bitcoin. Welcome to the real world of Bitcoin.