https://www.newsbtc.com/2019/07/22/bulgaria-big-on-bitcoin-as-reserves-could-exceed-its-gold-stash/ - seized BTC it is.

Some of them might use some cryptos as one of the parts of their financial reserve (maybe with seized BTC and other cryptos?). But the point here is the volatility.
More likely is that some special services might be using them already for years as speaking of their grey/black budgets.

The problem with scammers using cryptocurrencies is that unlike with card payment (or in some jusrisdictions wire transfer as well) you are not able to reverse transaction - the most notable exemption to this case is the series of events which lead to hard fork between Ethereum and Ethereum Classic.

Each new BTC price cycle is longer than a previous one, and this time we have as well rather bearish factor called FATF guidelines.

What about other BTC, which were lost on early days, when HDD had been getting broken etc.?

This is exactly why FATF created its guidelines, which potentially can paralyze the whole cryptocurrency market. As well, considering that privacy coins have the anonymous transfer modes, which somehow can break the transaction trace - here is the reason why those privacy coins are treated by authorities of many countries with full hostility, and even forcing exchanges to remove them from the list of available ones.

Basic Google threat to Bitcoin (like anything else) is that because of the fact it is almost a monopolist on the search engine market. Because of that google in the very first place they can manipulate search results to promote content of specific type.
Example - you google "how to buy Bitcoin", and the first page would consist only doom and gloom information about Bitcoin (like hacks, or how low went BTC during the last downtrend or some articles claiming BTC is used for criminals), and only on second or third page there will be the first information related to what you have been searching for.

Alternatively, there will be no search results - or like with youtube they own "This content is not available in your country".

Comparing "En primeur" price (its value in BTC) and the final sale value (and how much "en primeur" paid BTC price is worth now in USD).

Would you be so kind to give us such comparison?

Umożliwiamy jedynie zakup kryptowalut . Generalnie wygląda to tak, że w wypadku zakupu BTC  weryfikujemy głównie kartę użytą do transakcji oraz dowód osobisty/paszport, natomiast w wypadku privacy coins dodatkowe formy (jak np. selfie czy rachunek za media zaadresowane do użytkownika lub inne formy weryfikacji/dokumenty itp.) weryfikacji są wymagane. Także korzystanie z usług typu VPN stawia użytkowników w grupie tzw. podwyższonego ryzyka względem wytycznych FATF. Tutaj ich wytyczne są bardzo ogólnikowe, formy typu "nietypowy wzór transakcji, mogący nie mieć realnego uzasadnienia finansowego" czy "racjonalne metody/metody zgodne z najlepszymi standardami branżuy" występują nagminnie i niestety trochę to przypomina zasady "co autor miał na myśli".

Zatem w tym wypadku wiele podmiotów by nie utrudniać sobie działalności po prostu wycofa część bardziej problematycznych kryptowalut, a w wypadku tych oferujących privacy coins należy być gotowym na to, że weryfikacja będzie kompleksowa i dłuższa niż dotychczas. Co więcej, wytyczne zdają się sugerować, że tego samego poziomu weryfikacji będą wymagały nie tylko giełdy, ale także m.in. portfele online lub nawet sklepy przyjmujące płatności w privacy coinach.

Depends from the exchange, for us (Linkkoin) card verification is an element of verification procedure as well.
Moreover, we ask our customers to cover CCV code on the back and part of the card number itself. As well it is often spoken about credit cards in general - but in fact, debit cards work exactly the same as credit cards when speaking of using them online.

Tutaj akurat są dwie, a będą 3 ścieżki:

1. Molochy wydające karty płatnicze przez dostawców płatności wymagają rozszerzonej weryfikacji użytkowników kupujących anonimowe krypto
2. Organy podatkowe i pozostałe operujące w zgodzie z prawem organy (w tym ścigania) już zwracają się do konkurencji względem transakcji monero (szczególnie tych podmiotów, gdzie można wymieniać krypto na krypto, co w oczach władz było jednym z etapów prania brudnych kryptowalut).
3. W Wielkiej Brytanii dalej w opracowaniu są odpowiednie przepisy, więc na razie wiążących decyzji w systemie precedensowym po prostu nie ma.

Ale jak pisaliśmy - zgodnie z FATF oraz 5 Dyrektywą AMLP prawdopodobnie obrót każdą anonimową kryptowalutą będzie limitowany do stopnia uniemożliwienia bądź prawnego (zakaz obrotu), lub faktycznie niemożliwego do spełnienia (fizyczna weryfikacja właścicieli obu portfeli, transakcja możliwa tylko w formie transakcji pomiędzy portfelami - gdzie po prostu nikt nie będzie kopał się z koniem w celu weryfikacji i po prostu dobrowolnie się wycofa).


Update 28.11 - Wszystkich zainteresowanych użytkowników z Polski zapraszamy do zakupu XMR/ZEC, tylko prosimy pamiętać, że w związku z ww. wymogami dział weryfikacji jest zobligowany do szerszego zakresu weryfikacji niż w wypadku BTC/LTC/ETH/XRP.

There are some vineyards with such a good reputation, that you do not buy actual existing wine but you buy (reserve) the wine to be made few years in the future. Then they are stored by these purchasers for the next few years and then sold once again to the final customers on auctions. This is one of the ways people make money by investing in alcohol.

Maybe it would be worth to give a try (even for purely academic purposes), to make a bet like this:

1. Buy XX bottles of such wine for BTC (even if the wine would be stored at someone's else wine cellar)
2. Sell the wine to these final customers on auction
3. Compare the final value of the wine and BTC.

Some see death, some see opportunity

First, we had a death cross recently (triggering right now), and as well in the past in most of the years, the second half of December was always a downtrend due to upcomin taxation period, Christmas or cashing out for winter holidays. Unless there will be a bull run triggered by some whale, you can accumulate BTC cheaply, but do not expect much return yet, we are still away from 2020 bull run.

One of the many predictions here:
1. We had this month a cross of death (50&200 day MA), which usually gives us shorter/longer
2. For most of its history, BTC because of such things like taxes, Christmas and winter holidays, its price is starting to go down ~19-20 of December each year.
3. May 2020 - BTC halving is a major bullish factor.

So then our magical orb claims this time we might see lows like ~$5000 levels and then enjoy all the way up until 5-6 weeks before halving itself, this is usually when the hype train ends.

Of course, all of these predictions may turn out to be a huge miss, subject to some other factors (whales, legislation, hacks etc.) which may turn over the tide.

As always - go against the tide, during panic sells you buy, when greed blinds people you sell. And buying when the breakfast tv is fuelling the hype is the worst decision you can make (unless you will keep BTC in your wallet until the next bull market with new all-time highs takes place).

Of course this is not the most effective way of investing in BTC, but it works if you have little trading skills.

The best-proven strategy for regarding BTC as a store of value:
1. Late 2017 - the breakfast TV celebrities starting to talk about how awsome is BTC (literally a couple of days before the price began falling down).
2. Late 2018 - OMG BTC is dead, it is a scam (and then price just shortly after started rebounding).

Aka - why you should never trust a mob.

$700< gains of BTC within just couple of hours, wish we all had been dead like this!

There had been some cases already, where stolen funds got frozen by exchanges. As well, with FATF recommendations coming into force, there will be a requirement to verify both sending and receiving parties. This aims to exclude stolen funds from being used. This will have some side effects, like removal of privacy coins from the list of available coins/tokens.