What to do with a coin I recieved from a Kinnar(Transgender)?

So I was with my family in car on a Singal, two transgender approached our car, asked for money, I said no cash then they pulled QR, I scanned the QR and enter 100, they told no, and after some discussion, I gave 501 to them, me being young, she gave me a Normal 1 Rs coin from her purse saying " Ye le tujhe main apni lakshmi deti hu" (Take this coin as my Lakshmi to you) , I said dhanywaad maai, and kept it with me.

Now , what should I do, I have kept it in my wallet, should I keep it over there? Or there can be tantra to it to pull money? Not sure what do , please guide on this