The name of the coin is Libra coin and not global coin. What you said is true, they are going to use it as means of harvesting more data from their users and then sell it to advertisers. Another thing is that the coin is going to be a stable coin, pegged 1:1 with the USD, it’s not going to be like Bitcoin that is always fluctuating heavily up and down. So anyone who is going to be making use of it should just have it mind that it is just another payment method and not for investment. If you’re looking for investment, then that Libra is not meant for you. Though one thing about it is that lots of companies are going to be accepting it.