Same reason I am keeping some USDT on an interest bearing account, currently yielding 10% APY. It is much, much better than holding a USD savings account in a PH bank that practically gives nothing back:

_{FEATURES
Initial deposit requirement - USD 100.00
Minimum monthly ADB requirement - USD 0.00
Minimum balance to earn interest - USD 200.00
Interest rate – 0.05%
SERVICE FEES & CHARGES
Account closure within 30 days - USD 10.00
Below minimum balance - N/A
Withholding tax for interest earned - 15%
Dormancy Fee - USD 0.60}