I was thinking that $10,000 might just set off that red flag.
Currently international anti-money laundering, currency regulations require travellers to declare cash amounts of US$ 10,000 and above on arrival at the destination port - or such amounts that are of equivalent value, if in another currency.
If you are using an institution/bank/currency exchange, that institution will report any transactions above the limit to their national financial authorities, without any reference to you.
Amounts of US$9,999 or below in cash,are not required by law, to be declared on arrival, in the Philippines.
Point to keep in mind. It's not illegal to bring in whatever amount of cash you wish, as long as it is declared, if above the "free" limit.
A family travelling together has a combined total US$ 9,999, however, before being required to declare the currency. Meaning if husband brings in US$ 7,500, wife/kids can only carry US$ 2,499, before the total must be declared.
Travellers should do their own research, before deciding which method to use in moving money to their destination, as regulations change, mostly by being tightened up.

One way to consider safe guarding your stash, is the use of international pre-paid Visa or MasterCards. Most pre-paids have a limit on the amount which may be 'loaded'.
MetroBank pre-paid MC here has a maximum of PhP100.000, about US $2,000 (?) which may be loaded at any time. so a couple of these may be a short term solution.
A bank account is not required to obtain a pre-paid here. My daughter uses a "Cebuana" prepaid card, which we "load" every month directly from our Metrobank account, with her scholastic and living allowances. She then draws cash at any ATM, over the counter at a Cebuana Branch or uses it directly as a debit card to pay at McDohs, JoliBee or in the Mall shops. LOL!
Hope this helps.
Stay safe all.
Peter