90% of the bitcoin related news websites are desperate for smallest things to publish and get some traffic directed to their shitty website so you can only imagine how a heated topic like the supposed bitcoin's environmental damage could spread like wildfire. and that is exactly what happened, they hyped up the issue by exaggeration and false information and then the click baiters took care of the rest.

only if you can convince millions of people who are trading bitcoin that Chinese new year is affecting the market! and to do that you need to convince then to not look at the charts and instead take your word for it blindly.
otherwise we are on the same path as before. price is being kept down for accumulation and profit making and it won't go up unless whale accumulators are satisfied or enough time passes that the market rallies against them.

considering 21 million is amount and is only used in that context you do not do any multiplication or division on it. only addition and subtraction and since it falls within the max there is no overflow.
secondly we have nothing called "64-bit double floating number", there is double precision floating point and that has nothing to do with what bitcoin uses since there is no decimal precision here. we have purely a 64 bit integer. or int64_t  in c++ which is
9,223,372,036,854,775,807 and bitcoin has
       2,100,000,000,000,000


i honestly am confused where they are getting these numbers from!
64 bit would give you 64 bits not 52 bits! not to mention that the maximum value of a 64 bit floating point is 1.7e308!

bitcoin is constantly improving and evolving, and so far it has been the best cryptocurrency that has been created because it is at a balance between all the features. it is not going all out on one thing to sacrifice everything else. like having faster transactions without decentralization.

of course like any technology it has only so much to improve but we have at least another 50 to 80 years before we see something that can beat bitcoin in its game.

incremental buying is always the best strategy in bitcoin in my experience if you are not a day trader. and specially when you are investing your extra cash into bitcoin. monthly investment is one of the more common strategies that investors use when it comes to bitcoin. that way you don't have to worry about the daily fluctuations and manipulations or even  the drama anymore.

there is always going to be dependency on third party services in my opinion. and banks have just been doing that, they have been offering services that people want and made things easier for them. of course the corruption,... came later.
but since that needs still exists i say the banks or any bank like services will also exist in the future. see how web wallets and web accounts such as coinbase exist and people use them although they shouldn't? that is the need i am talking about. some people don't give it up.

well etherum is more centralized than anything else. so you can't really say stop using banks and use another centralized corrupted coin like ethereum!

comparing one year to another is completely pointless. for starters history repeats itself but not the way you think. on top of that we have a very dynamic market which is always changing although at times it may not look like it.
besides you should always look at the bigger picture instead. zoom out and look at the real growth that bitcoin had and the trajectory that it has been on for a long time without faltering.

obviously his permanent bull predictions are sometimes ridiculous, like the thing about a new ATH for last year while no recovery had yet have begun although the recovery was so close.
but let's not forget that just because price hasn't gone up, it doesn't mean it is not underpriced. and it deffinitely doesn't make this price real. you can't predict when the rise is going to happen, nor can you predict whether there will be any more drops. but you can clearly see that $3k is not a representative of bitcoin's true value.

if you want to be safe then convert it back to fiat. whether it is the Tether you are talking about or some weird ERC20 token it doesn't matter. neither are safe, the token is probably even less safe especially since it is stealing another coin's name!

you may think Tether is safe because of all the fake promises you have heard but nobody promised any safety ever and the company issuing it is shady enough to not deserve any trust.

it depends on the coin and the reason why they created it! you can't compare everything with bitcoin and say because bitcoin is certain way then everything else has to be that way too.

if the  coin is designed to be decentralized like bitcoin then nobody owns it, as it is with Satoshi and the reason why he disappeared. such coins will require the whole network to decide for its future because the whole network is the "owner"
but if the coin is designed to be centralized then it is owned by the creators. for example ethereum or ripple.. and whenever they make a decision, that decision is final and any participants can not have a say in it.

NO. it is not. and you should stay away from any kind of "signal" service in my opinion. they all out there to rip you off and take your money one way or another.
there is an old stock market saying that goes like this: if the market experts were so expert, they would be buying stocks not selling advice".

people sometimes share their speculation with each other though. like on tradingview.com but you shouldn't confuse that with "signals".

there you go: https://www.google.com/search?q=bitcoin+history

anything but price: https://www.google.com/search?q=bitcoin+future+-price
price related: https://www.google.com/search?q=bitcoin+future+"price"

there is no way in hell that bitcoin continues to decline.

however there is a pretty good chance that we see another attempt by the whales to pull the market lower and break a new low support line and set a new record for this round before they let the jump up to take place.

for the time being you should get comfortable seeing $3k-$4k range for some more time and either accumulate or be greedy and risk missing out.

sorry sweetheart you are way too late to the party. the "bubble" has been over for over a year now and it was not different from any other bubbles that we had seen before it and the market is not that different either. the only thing you might find different is the duration of the different stages that the market HAS TO take but that is not enough to make it "different".
the rest of the things you are putting in this wall of text is just you trying to fill in some space pretending you are reasoning....

most of the things you just mentioned here are also happening in other parts of the world too. for example a lot of other countries (nearly the whole world) is moving forward with banning ICOs and any kind of similar method of raising money and scamming people with fake fund raisings to give them a useless token.
also any other country would have shut down the shady exchanges that China had a very long time ago. the fact that they were so flexible and allowed them to stay alive that long was a miracle with all the money laundering that they were doing!

i don't know about this new news article you posted though but since the source of it is a shitty website i wouldn't even bother looking into it.

as far as i can tell there is no difference between buying or selling. the user still has to go through a bank whether it is receiving from that bank or sending money to a bank. and in both cases AML will come in.

how? what exactly do you do that makes your business more profitable than other giants so that it allows you to lower your fees?

the only thing that the altcoin pump and dump of 2017-2018 did was to help a large number of newcomers become familiar with the altcoin market and know that not everything that they hear in the advertisements of shitcoins is truth. they are always exaggerated to get them to invest their hard earned money into these tokens.

i do believe that the heart of the problem lies in the attitude of people. they don't really want any progress, they instead want to make money so  the altcoin developers aren't developing anything anymore, instead they give them what they want which is pump and dump shitcoins for maximum profitability.
there are still good innovations going on among altcoins though. but sadly they are always at the bottom of all the lists because they don't get pumped.

nobody can tell you whether you are on the right track or wrong track because the question is vague at best. and since there is no standard for brainwallets i would be surprised if using it would work. for example this one that you linked is doing a 1 time SHA256 on the passphrase, i have seen others do different numbers of hashes, or even using HMAC functions or use PBKDF functions and use your passphrase as its seed with 2048 iterations.
each of these methods would give you a different private key and without a starnard who is to say which one you should use?

you first have to see which countries will accept you as a citizen then think about whether you want to live in those countries or not considering everything including cost of living, economy, and a ton of other things. and the last thing you should think about is whether you can buy a home there with cryptocurrency!