Facebook IS losing a lot of attention however they are lucky that they grabbed whatsapp and instagram at the right prices. As far as I remember they IPO'd facebook at around 100 billion dollars in value, think about it, a social media platform that worth 100 billion dollars makes no sense at all, it is like buying a 100 billion dollar car, it will eventually lose value so why spend so much money on it ?
They bought whatsapp which basically doesn't lose value as long as people keep talking online with each other so I assume whatsapp will be relevant for long long years until a rival could dethrone them. Instagram is still great on social media level but like I said about facebook, that will slowly fadeaway and a new one will come eventually.
Facebooks crypto move would only be interesting so we could see if they could revival facebook by using crypto as a system to attract young people again.