Honestly speaking I see no place where biometrics may be used in sensible way as a way to authenticate user.
As a source of entropy? Maybe. But then it cannot be the only parameter, as results would be (to some extend) repeatable.
As a additional phrase /extra password/ for previously generated seed? Then again, results are repeatable.
Using as a method of authorization - nothing new, it is just a one more layer on wallet level (for software, I am not aware of any hardware wallet with fingerprint reader), not on low-level (private key generation).

As someone mentioned before, the risk for today is that coin will be delisted from Binance and will become purely 'virtual/internal' token. Then no-one will know of it's existence if is not interested in active use of one of their sites.

I have checked quickly what are google trends for "Fun token" phrase:
https://trends.google.com/trends/explore?date=today%205-y&q=FUN%20token

It does not look good. What is has in common with "Sentosa - Island in Singapore" topic?
Africa is completely gray, except Nigeria. Post-CCCP republics too.

Personally I think paying to some "influencers" from youtube or instagram world could have positive effect, at least more people would realize something like FUN or freebitco exists.

There is one person who may help, Musk. Can you imagine he announces on Twitter "I buy FUN"? Maybe it might be an idea for promotion - to find an interesting person to became "face of FUN". Football player or so. Or at least 1-2 youtubers.

In my humble opinion, as a person who works in IT sector for more than 2 decades, there are also other areas where they may improve their webpage. For example - speed up transmission by removing unnecessary data transmitted from server to browser (they send already formatted date, they send "full"/BTC formatted/ amount instead of only sats etc.).

Could you write what are positions of missing characters? At the end, at the beginning, in the middle? Is it one group or there are several groups?

If it is one group and as you seem to have public key (is it indeed correct?), it should be doable with Kangaroo in a very reasonable time.

Which means that if someone wants to hold FUN tokens, take interest from locking etc, current price is still a good price. Probably I should start to regret that I did not buy more when it was for 21 sats (but I bought 12500). Now I buy from time to time small amount, but it is not a serious step into 50k level.

I see no correlation - Windows XP was released in 2001, Gates was CEO until 2000. It is true that one may have different positions in company, but CEO is CEO. And Skype was bought by Microsoft in 2011, so what is the point?

Did not you consider buying extra tokens to have 50k as soon as possible? It would give a serious boost to your bonuses (WOFs).
Do you execute WOFs every day or did you wait for the end of cycle to launch them all. Now we are still at max base reward (50), so I see not reason to keep them.
And of course you receive interest from your sats kept on the account.

No, you were the first who said that two problems are connected, while they are not:

It is not a rocket-science task. Recently I have written something similar (https://bitcointalk.org/index.php?topic=5409026.msg60709184) but it was written for private use (clearing known addresses from a given xpub), so I think it is not a good tool for that purpose (quick 'stealing' incoming coins) - script is quite slow (one-threaded) and taking into consideration that there are hundreds or thousands known private keys where some dust comes from time to time, it processes transaction too slow to be competitive.

But it is also true that if you have bigger budget for start, you have bigger chances for helping your luck. And good timing is important too - now you may buy FUN for 35 sats, some time ago it was for 21, earlier for much more, like 40-50 sats, no? And with tokens you have levels of premium membership which has impact on number of WOFs. So yes, luck is important, but sometimes you may just have more occasions to try it

Freebitco brings some specific feelings with that old school look, like “focus on features, not on UI”

It is interesting concept, but it moves discussion into completely different direction. First, we should answer the question if private key (and/or access to it) should be personal or should it be transferrable. And another question is if current technology is secure enough. For example, read that article:
https://medium.com/hackernoon/demystifying-apples-touch-id-4883d5121b77
It describes how Touch ID is designed. You may ask question - what you really want to rely on: do you want hardware/software from a given producer to tell you if you have access to the private key or do you want to have reliable solution which produce always the same result for a given fingerprint. I assume that each time you scan (add) your fingerprint into system you must be sure the generated hash will be the same - otherwise you cannot access your "wallet" on the new device (or after factory reset).

'secretslib' PyPI package covertly runs cryptominers on Linux machine in-memory (directly from your RAM).
The package, at the time of its release, claimed to be a library that "helps with matching and verification of secrets". The main 'setup.py' script inside the package contains straightforward base64-encoded instructions:

The stipped 'tox' binary has a clean reputation on VirusTotal [archived], as it achieves 'zero detection' across virtually every antivirus engine. The malicious code dropped by 'tox' (referred to as 'memfd' by VirusTotal) is a Monero cryptominer. 'secretslib' package deletes 'tox' as soon as it runs, and the cryptomining code injected by 'tox' resides within the system's volatile memory (RAM) as opposed to the hard drive, the malicious activity leaves little to no footprint and is quite "invisible" in a forensic sense.


More details: https://blog.sonatype.com/pypi-package-secretslib-drops-fileless-linux-malware-to-mine-monero

Interesting remark. It is possible to launch search without given target address, then program will output every WIF which fulfills criteria (produces the correct WIF having initial parameters). I think they do not use that approach. It would give many results, but as usually when we are in crypto world, chances it produces address with balance are almost 0.

Maybe it is lack of budget for UI refresh. Or maybe that's the way of saying - look, we are still there, running for years. Other sites bankrupted or stole users' coins, we are still there. We give you the same site you had 2, 5, or more years ago, the same reliability. The same $200, the same lambo lottery. And if you want fancy images, we invite you to one of our other sites.

Skala jest rzeczywiście wielka. Ciężko też powiedzieć czy to specjalnie jakaś akcja dla "osłabienie" kraju czy po prostu wypadek (jak powodzie itp) pokazujący jak słaba jest koordynacja i współpraca. Jak się okazuje niewiele potrzeba by zamnąć się w kręgu obrzucania niekompetencją, w przypadku Odry aż nad to. Ciekawe bardzo co wskażą próbki wody.

Na marginesie: globalny poziom skażenia wód gruntowych, opadowych, jest zatrważający: https://pubs.acs.org/doi/10.1021/acs.est.2c02765#

I may ensure you there are thousands of valid WIFs with a given checksum. That's the way how my program WifSolverCuda works, it calculates checksum for private keys and if it covers the expected one (from original WIF), pubkey, address etc are checked. But as application verifies millions of keys every second, there are many, many hits of potential keys.

It has nothing to do with original question (at least not based on what I know). OP claims he is still searching for his WIF, as he wrongly decoded some characters, and work continues. Nothing new is known.
It is true WIF500 is a very similar problem (similar combination of known characters and missing ones).

You are right, I was so focused on other things that I completely forgot about that option. My only concern is that address changes every time service is started - I do not know know how it behaves when there is network interruption (it happens), in case of power failure device will be for sure shutdown (maybe restarted).