No problem keeping 2 to 3 months worth of pesos. I hate it when we don't have enough loose change on hand to pay cash on a variety of things like bottle water delevery, cleaning out our roof gutters, maid's wages 3 times a week, weekly palengke trips, hired help for repairs around the house, take out food home deleveries, on-line home shopping COD deleveries, wife's saloon beauty retreatments (not cheap), fast food drive-thru. I use our banks ATM card to pay for our Mercury Drug Store medications once every 2 weeks, since I need double receipts for our TRICARE reimbursement claims once a year. We just got back over $2,500 from our meds claims for 2017.
So, having enough cash in the house works out for us without having to go to the bank often, but once every 2 to 3 months.