I just meant that it is easy to compromise a paper wallet if compared to a hardware wallet. Seeing a paper wallet is like seeing money, unlike hardware wallet that require extra work which the people given may not go for.
Irrelevant. Whether or not it is morally right to steal money which does not belong to you does not depend whatsoever on either how easy that money is to steal or how likely you are to get away with it.
Isn't morally incorrect to not utilize money that might be lost?
No. Because bitcoin that
might be lost equally might not be lost at all.
Given that the OP published the exact amount of BTC in question (0.6104), is it possible to search all addresses that contain exactly that amount in case it is only one address?
OP said "0.6104...ish". There are no addresses which contain exactly 0.6104 bitcoin. There are 85 addresses which contain between 0.61040000 and 0.61049999 bitcoin.