Well if you're wondering how the scam works like @Cryptosize, I can explain it as I fell for it.

Like the OP I'm a crypto-noob living in Melbourne. A little less nooby as I did open a Binance account last year to help my son retrieve profits from some staking he'd done late 2021 when we were in what retired futures traders like moi call a dead cat bounce.

Anyway, after I'd retrieved his $140 I decided to tip in c.$1000 in BNB, ETH, IOTA and one other (can't remember - ADA? Cardano? Matic?)

So yesterday I was walking along Bell St Coburg and after seeing the third of these 'bright shiny objects', thought I'd investigate.

Brought it home, logged into https://paymetic.online/ with the requisite credentials, transferred the required USD92.55 in ETH and waited for my 0.62BTCBTC to land in my Binance account.

A couple of asides for those still following:

• I obviously don't have the high moral standards of the OP who sought the wallet's owner. I figured if you store your moolah on a paper wallet with no traceable contact channel, you have taken a risk that lets opportunists like me in. I've done sums of money with similar levels of laxity. Comme si, comme ça
• Getting to this point in the process had taken me nearly two hours [I said I was a noob, okay?]. I considered USD12k reasonable reward for my effort and risk.

Anyhoo, the upshot is I end up with this message on the Paymetic transaction page:
".


and the 0.08044ETH/92.55USD gone from my Binance account, but surprise!!, no 0.62BTC deposited.

Oh, well, I've escaped many other scams in my 40 years on the internet... pretty good considering.