Both the facts that it is completely anonymous "Which is not true since anyway can see your transactions and follow the blockchain to their origin" and it's free to send transactions "the fee is voluntary but is almost a must".
I have no idea where people came up with the 'completely anonymous' fact; nothing truly is.
I think this rumor will become true as price is 430 right now and the price might go up to 800 more or less still its a good price after the halving.
That's just useless speculation and not a fact. It may go up or it may not, you won't really known until it happens.
Probably the privacy and anonymity gossip, it is still relatively private but all the transactions are visible in the network..
That does not matter. The blockchain is a transparent ledger and anyone (who uses a cryptocurrency) should known this by now. Regardless, Bitcoin remains pseudo-anonymous.