is it just for privacy reasons or do you have any security concerns too? because i can not think of any security risk that could be because of connecting to a public internet connection like using a public WIFI, worse case scenario is that they can figure out you are using bitcoin (sending a tx for example) but they can't do much else like seeing your private key hence no security risk.

short answer: market cap

lets say you have 100 apples and put all in circulation. now if 1 apple is worth $1 then the true market capitalization of apples is $100 (supply * price).
now lets say you have 100 apples but only put 10 of them in circulation. now if 1 apple is worth $1 you still get the same market capitalization of $100 but it is fake because the real market cap is $10

now lets say instead of apples you have garbage that 99% of people don't want. if you inject all the 100 garbage in market the price tanks to 0.00001 but if you only let a tiny portion of it be in the market you can keep the price higher while keeping the market cap up.
now you have a shitcoin that has no value and a low price with an enormous (fake) supply and (fake) market cap that is in top 10 rank.

being in top 10 rank means newbies who don't know any better fall for your shitcoin and buy it so you earn money.
additionally you own the rest of the supply that you locked away so you can make profit from dumping small portions of it each time your shitcoin pumps.
coins like ethereum and ripple are exactly doing this.

when coins burn their tokens they show that their developer had no idea about economy so he couldn't set a decent supply and had to take desperate measures to try and keep his shitcoin alive.
besides burning is not going to increase the price. it may cause some temporary hype but that's about it.

it makes perfect sense that price be at the lowest in weekend and starts going up as the new week starts. it is usually the case with other markets with their market open and close times.

BUT the problem is that it is not reliable! first of all there is no guarantee that price makes this kind of move every week. there simply is no reason for it. secondly it depends only on the trend. for example if we were in a downtrend then the start of the week could be a big crash as people start selling as they get the opportunity.

this type of strategy is more like the "blank month is a rising month" strategy that many had over the past couple of days and were disappointed every time! (blank is most of the months in a year but mainly from February to August)

he doesn't understand the technicality of bitcoin, how it works and things like that. but he understand the power and value that bitcoin has which is the only reason he is trying too hard to stick himself to it and feed like a parasite.

i made a small mistake above, your S should not be bigger than N/2 not N. so the check is this: if (S > N/2) then S = N - S
i don't see any other issue with your transaction though.

you should pay attention to the error messages you see. they usually tell you what was wrong.
in this case the problem is the public key you included in the scriptsig.

the script verification is like this:
- push 1 item (sig)
- push 1 item (pubkey)
- duplicate top stack item
- pop and hash top stack item with RIPEMD160 of SHA256 and push the result
- pop top 2 stak items and see if they are equal

this last step is where it stops because the hashes are not equal.
with a closer look you are using the "uncompressed" public key (it starts with 4 and is 65 bytes) which is wrong. you should replace it with compressed key which is 03d6e5ff918b8388dc49cdfc115ddc1ea9fd4d884dd8b87ef6602a6bd07b5c1748
then the evaluation will pass.

there is also another point to keep in mind which OpenSSL is not doing which is you MUST have a low S value otherwise the signature verification will fail.
to do that parse the signature, if (S > N/2) then S = N - S

you gotta read between the lines, there will never be a lawsuit. he is just an attention whore who needs to pull something like this every now and then or he is going to be forgotten as the idiot who tried to scam people and was laughed at.
but this way, we keep talking about him every damn day! imagine if news sites agreed not to mention him ever in any of their articles. then it would be as if he doesn't even exist.

as far as i know when something is released under MIT license it means anybody is free to copy the code without needing any kind of permissions whatsoever.
in other words this is just another bullshit out of a big scammer who has been getting forgotten by the media so he made some noise again to remain in it!

everything will happen in its appropriate time not any sooner. prices such as $90k are going to be reached some day just like $20k was reached before and it looks like nothing today. but it won't be because of cost of mining but will only be because of adoption and nothing else. the limited supply that is the product of halving is only the cherry on top not the reason.
and believe me when i say this miners are going to leave the moment they can't make enough profit. so far we see that not only they aren't leaving but also they are expanding which proves that they are making a huge amount of profit even with all the halvings!

i dare say that the recent drop in bitcoin price could have been caused by the dump in altcoins. at some point it became bigger so that a lot of money kept exiting the altcoin market  and like always when the altcoin panic sells start some part of the money exits to fiat using bitcoin first and that can put a pressure on the rise specially when bitcoin is trying to break a resistance.

this is your mistake.
in bitcoin you don't just hash the raw transaction itself, you have to first modify it then hash the modified result.
this hex is missing 2 things:
1. the scriptsig is empty which should have been replaced by the scriptpub of the input you are spending
2. the sighashtype at the end which is a 4 byte integer in little endian order.
you can find more information on bitcoin wiki's checksig or on SE:
https://bitcoin.stackexchange.com/questions/32628/redeeming-a-raw-transaction-step-by-step-example-required

these steps are more complicated for different script types though.

these days it seems like most people are expecting a very small drop possibly back to $9k or something like that so they are all spreading a lot of FUD to capitalize on that possible opportunity since most of them haven't bought any bitcoin yet since they were foolishly waiting for a big drop before this rise began and now they are again foolishly waiting for another big drop while price keeps rising...

the shitcoin advertisers are so stupid that they don't even know how to advertise their shitcoin. only a stupid person would ever choose bcash over bitcoin simply because bcash has zero security since they can reverse any transaction in any block they want as they did it recently by reversing a third party individual miner's block with their centralized power.

the profit is mostly cashed out before the $10k rise in the previous corrections and the buy backs have also happened too. that is why the so called "correction" after the $10k+ wasn't even significant and it leads me to believe that it was only whales trying to pull the price back down rather the traders selling to take profit.

k has to be a number that can not be guessed. that is why it is suggested to choose a random one, but later on they realized that you can't rely on RNGs so they came up with a new idea to generate it deterministically using your private key and the message being signed. that is why when you sign same message with same private key you always get the same exact signature. check out RFC-6979 for more details.

in fact nowadays most wallet only use an RNG once per wallet and that is when you create the wallet to generate your seed then every future private key and every signature's k is being generated deterministically without needing RNGs anymore.

so far there has been zero evidence suggesting that bitcoin price is remotely affected by Coronavirus. not to mention that although there are a lot of concerns i don't think we can call it a serious outbreak.
the rise that you pointed out, to $10k, is the well expected rise that had to happen sooner or later. and in fact this year we are going to continue seeing a lot more of this type of rise until the previous ATH is broken too.

the difference is that BCH had to manually manipulate the difficulty and how it adjusts in order to stay alive at the beginning without having 10 hours between each of its blocks. as they did that, some miners abused it to mine thousands of blocks per day so this altcoin chain is far ahead.

it sounds like just another nonsense that can be found on social media like twitter that you have come across. the fact is that bitcoin is trending everywhere, sometimes when the price breaks some major barrier (like $10k recently) it starts trending more than normal times but again it is "everywhere" not just in China.

as for China not liking bitcoin, their government obviously (like many other governments) doesn't like bitcoin because it is taking the power right out of their hands and gives it back to the people. but bitcoin is a phenomenon that can not be stopped.

you'd expect something called "cryptoharvard" produces something a lot better than this that doesn't have this many mistakes! and from the first line till the last it is filled with mistakes.

"created in every 10 minutes" 10 is the average time and shouldn't even be mentioned here. "every four years" is also wrong, it is every 210000 blocks which is approximately 4 years even with 1 block per 10 min. the reality is that it takes less than that due to hashrate rises.

"a blockchain is added to a bitcoin blockchain" that sentence is wrong as a whole... a new block is added to "the" bitcoin blockchain.

"every time 210000 blocks were mined in the blockchain" blocks aren't mined "in the blockchain"
"when all 21 million coins will have been mined" is also wrong, 21 million will never be mined since some coins are already unclaimed by miners.

"in May 2020" is an approximation, not an exact date. some predict April actually.

first of all security of RNG has nothing to do with the computer being modern, it is about how it was implemented.
secondly there are no random numbers being generated when creating a signature (both during message signing or transaction signing). everything is being done deterministically, meaning nonce is generated using your key and the message utilizing HMAC function.