How much is the suggested amount of starting investment on bitcoins?
This is entirely up to you and will depend on how much profit you intend to receive
In United States Dollar currency please or Philippine Peso.
Again this is entirely all up to you or the exchangers preferred currency
and also, is it better to invest in bitcoin rather than investing in stocks?
I would say bitcoin is better because you get to manage everything unlike stock which is usually managed by a third party and payouts are all after a certain time frame