I'm wondering if I should just send the funds to the address on this app or just keep the old wallet how it is and pray I can open it in 10 years. Who knows, maybe it will be $1000 for my tiny amount. Thanks.
You can keep the old address so long as you are sure that it's private key has not been compromised. That aside, if you really want to enjoy the benefits of bitcoin profits, you can always try to buy small amounts of Bitcoins and send them to the address whenever the Bitcoin price is low e.g. in March this year Bitcoin dropped to ~$4,000. If you had bought any amount of Bitcoin at that time, you would be more than 5 times rich right now 