this coins.ph has a good feature of directly converting BTC into Peso or Peso into BTC and cashing out real money with so much options. But I gues there are some laws that prohibited large amount of money to avoid money laundering, I guess. I do hope there is something similar with in USD.
If you passed their KYC and send all the required documents then no worries if you cashout the maximum withdrawal available at your tier. Why in the first place they will show you that a certain amount is your maximum if it's prohibited by the law.
AFAIK, the maximum amount available in coins.ph to be withdraw is really a large money. The only concern here is the maximum amount per day and depends on what method will you choose for withdrawals as other withdrawal methods have daily limit at their own premises.