For me the best way to transfer BTC to PHP is via GCash, lately ko lang nalaman to pero let me share to you know on how to do it.

1. If you happen to have your BTC on trading platform (Kucoin, Binance, Bittrex, etc), transfer it to your Coins.PH account
2. If na receive mo na sa Coins.PH account mo, then transfer your money to Gcash. 2% lang ang bawas, for example, if you will send 1000 there will be a fee of 20 Pesos for transferring your funds.
3. After, receiving it on Gcash which is almost instantly, transfer it then to your bank account using Gcash account. 0% po ang transfer fee from Gcash to your bank account which is nice. I use BPI, the transfer is almost instant also. That's it. Viola! You have you money on your bank account already.

In summary:
Trading Platform (Kucoin, Binance, Bittrex, etc) -> Coins.PH -> GCash -> Bank Account

In my opinion this is the most affordable and most convenient way to transfer money from BTC to PHP.

Hopefully, nakatulong to sa iyo.