Among the multi-currency wallets available (YouTrip, UOB MightyFX, DBS MCA, RHB TravelFX), which one would allow me to get the best buck while in Europe?

Another consideration that was raised in recent YT meet up, with the fee being a flat amount, it might be a better choice for large withdrawals (ie $5 fee vs 1.0% FX charge - better off if you withdraw more than $500.

I'm not sure about UOB Mighty FX and RHB TravelFX. but comparing DBS MCA to YouTrip; Based on what i have gathered and through my own experience, YouTrip tend to offer better rates with the least margin. On another note, i do personally feel that it's safer to use YouTrip instead of your own debit/credit card as a precautionary measure against theft as you can instantly lock your card from the app.

DBS MCA does offer free overseas withdrawal, though quite a limited range of banks/locations. I believe that overseas ATM Withdrawal would only cost S$5 with the YouTrip card, a small price to pay for the additional security of not holding on to too much cash. It would also be prudent to bring along a backup card such as the DBS MCA that you can keep just in case you do lose the YouTrip card.