I think this is a completely normal warning to people from scams. In fact, many governments around the world are also warning people to be wary of cryptocurrency scams.
This warning does not indicate that the Philippine government is against or banning cryptocurrencies, they are only trying to protect people from scams.
The EU Central bank has issued similar statements on more than one occasion. I think there's nothing to worry about and it will not decrease adoption in the Philippines. This warning does not indicate that the Philippine government is against or banning cryptocurrencies, they are only trying to protect people from scams.
The banks are expected to warn people of investments that are risky and popular because people expect it and don't understand that some things are not yet regulated and cannot be stopped by the government. They think all investments come from companies that have to register with the authorities but it's not that simple with cryptocurrencies.