maybe but usually people put off these things until the last minute. even though there has been a lot of talk about halving these days but there has been a lot of talk about it when price was falling down from $6k also. so if they wanted to buy they would have done it then.
plus each time in the past, they have always FOMO bought in 1-2 months before the halving not a year before it.

would you say Paypal is successful? i'd say it is. what happens to bitcoin when Paypal is successful? absolutely nothing! why? because it has nothing to do with bitcoin. it is a centralized anti-privacy payment system that is censored and isn't even global despite being on the web.
Facebook coin called Libra is exactly Paypal with a different name.

i don't think that's correct in this case because of the third line of the error message which clearly indicates the reason. the malicious servers return an error message that can not be parsed which then would show a different message to user which has no "reason" in it.
OP's transaction has dust output in it and since 99% of the nodes are enforcing the same rules i don't think changing servers would help him at all.

sorry for your loss but this is already an old phishing attack that was using a vulnerability in older versions of Electrum to show users a message directing them to a fake website and telling them to download a fake Electrum version. if you ignore that message or if you followed the basic security protocols and tried verifying signatures before installing anything, you wouldn't have lost any coins.

as for your AV, most of them are recognizing Electrum as having malware. it is a false positive. if you want to feel safer then download the source code and compile it yourself after reviewing it.

altcoins such as ethereum are just big not established. they are centralized so they have a lot of money to advertise it and also do pumps. with the hype they got where they are which is not dying off. in the end these coins are no different than the rest of them and it is going the same rout of decay over the long term.

that is because TestNet difficulty is designed a little differently than bitcoin's MainNet difficulty so that it can drop to 1 if it took more than 20 minutes to find a block. that way we can ensure TestNet goes on without getting stuck due to high difficulty and lack of hash rate.
but at the same time dropping difficulty to 1 means you can find blocks with your CPU (with a little hashrate) and if someone has a higher hashrate (like using their ASIC) they can mine a ton of blocks in a short time. that is why there are a lot more TestNet blocks now.

you mean spend an unconfirmed transaction? yes that is possible.

open up a topic if you can't find the answer to any questions. asking in a dedicated topic can bury questions.

you can't talk about bear market and bull traps when we have been in a solid bull mode for nearly 5 months. specially since it was an obvious reversal after over a year of drop that was as big as 85%!
that only can be true when it is the start of it the bull market and price is just starting to go upwards.
$4000, no, $3100 was not just a bargain it was a wet dream come true. basically anything below $6k was a golden opportunity

he keeps repeating "bitcoin has not bottomed" because he is one of those who were waiting for $1000 and dumb low prices like that... and what do you know he actually says that number after 15 minutes. you can't expect price to drop 99.9999% before you are satisfied and call it "bottomed"

arguing it  took X months to recover from previous bottom and now it is taking shorter is dumb

what malleability "hack"?

the only thing you can do to make it work is if you are a programmer and write a "translator" app that can take as input the format that each of these wallets give out and then convert it to the other wallet's format that it can understand. it isn't that hard to write something like that either, it just takes time. you can use this link to get started: http://docs.electrum.org/en/latest/transactions.html and use Electrum's source code for detailed information.

if you have the latest version of Electrum and enter an address in its address field and it tells you it is "invalid" then it means it is "invalid"! changing your wallet type will not change a thing. try checking what is wrong with the address you are pasting in that text box.

the smallest amount of fee you can use is 0
the smallest amount Electrum lets you use is 1 satoshi per byte
the smallest amount that you can use to have a high priority transaction (aka a tx that confirms in the next block) changes every second so there is no easy answer to this. the only thing you can do about it is to check the slider, change it to a number that says "Target 1.0 MB from tip" to have the smallest fee while the highest priority.

you are never screwed just because you sold at some price and then price started going up. instead you are screwed when you see that rise clearly but instead of correcting your mistake and buying back at a small loss, you decided to wait until you are in a much bigger loss and still not buy back.
you are also screwed because you entered a market and started trading in it that you had no understanding or experience in.

when you look at a fake number, all your conclusions are going to also be fake.

"dominance" that coinmnarketcap.com reports is completely fake because the number they are calculating has nothing to do with actual "dominance". it is simply a ration of bitcoin's market cap against total of 3000 altcoin market cap.
when things are calm these shitcoins get pumped and have their market cap increased and decrease that percentage. but when bitcoin is rising, all these shitcoins get dumped so their market caps go down hence that number goes up.
additionally when bitcoin has risen for some time there is a lot of newbies in the market then a ton of new shitcoins are  created with massive market caps which then decrease that percentage!

then you look at that fake number and think bitcoin dominance is changing!!!

wrong.
price started falling from $20k because $20k was a bubble. it reached $3100 as the bottom because near the end the whale manipulation was at its peak. it had nothing to do with transaction fees.
this is not the first time we see a roller coaster action from bitcoin. the $20k bubble was repeated at least 4 other times before in the same exact manner!

i seems like you think bitcoin is a centralized bank with miners as its owners!
the reality is that miners are only workers that we have employed to do the "job" of finding blocks. the fees went up because of the fee war due to number of transactions wanting to be in blocks surpassing the size of the blocks.

the only thing you can blame miners for is whether or not they were participating in the spam attacks of 2017 and whether they were one of the many groups that deliberately spammed bitcoin to increase the backlog and start the fee war that increased the fee. but that would be a speculation and an entirely different discussion.

usually when you are not "day trading" and instead are making an "investment", you do it in a longer term not just after a short time like a month. as a result you would be looking for a higher profit that is bigger than the 6% that you mentioned in your example before you think about taking any profit out.

the other matter that you consider in your scenario is the situation with price. meaning since you are not day trading you want a major rise and a top that is going to be followed by a big correction. using the rally of 2017 as example you want a price like what we had on September 1 and sell there then wait for a week or two for the correction to come to an end and then buy back which would be the profit after about a 100% rise and the drop/correction of 20%

the reasons in decreasing order of seriousness:
- it is a web wallet which means you have to visit a website to open it, although everything happens in your browser and they only store the encrypted wallet file but there still are a lot of risk involved that can lead to losses. specially since browsers aren't the safest thing with their JavaScript!

- although they have released the source code, you are still accessing a closed source website which you can't know what actual code is being run by them.

- in the past their platforms had very serious bugs that has led to loss of funds (like usage of random.org for entropy generation!)

- their platform still has many minor bugs that have existed for years and are well known but not fixed since they are not serious.

- their wallet and explorer don't support new features of bitcoin that were added nearly 2 years ago called Segregated Witness.

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as for the wallet to use instead, read the sticky topic in this board about wallets.
my suggestion is that you start with Electrum. since it is light and user friendly. but you have to learn how to use it correctly, start by learning how to verify PGP signatures since you need to verify the authenticity of the binaries you download.

technically Electrum is never at fault no matter what the incident is, because it is open source and released under MIT license which means the program is released as is without any guarantees and they are not liable.
but this case was an exploitable bug that existed in the application and like any other application out there that is normal.

i'm not sure what you are trying to do with this phone number, is it some sort of scam that you are trying to pull?

these bigger rises are mostly because of FOMO from certain type of investors. the type who got so greedy at some point in the past couple of months that they decided to wait for a gigantic unreasonable drop to to stupid levels such as $1000 to start buying then. most of them fell for FUD and were stupid enough to believe it.
as price started rising, these people stopped believing in that FUD and started coming back. on each level a big part of that group FOMO buys back in hence the big jumps.
now that we are above $10k i believe most of them are already in and to see $15k we either have to see a slower rise or if a bigger rise happens it needs new kind of FOMO from new investors.

maybe somewhere in Africa that they don't even have electricity but in the rest of the world even in under developed countries, the world is moving towards more digitization and part of it is the usage of "digital" money which consists of digital banking, payment processors, credit cards and recently bitcoin which introduced concept of cryptocurrency and blockchain technology and is becoming more and more popular every day.
of course what this bank means is that they want to get in and create their own centralized blockchain based token.

since $9k range isn't that far anyways then it is easily possible to see it again but technically speaking there is no reason for it to happen anymore as we had the rise to $11k+ and the correction of that which brought the price back to $10k bottom and started the slow accumulation for the next leg up again.
the only case where a drop is possible is when some kind of panic happens with some whales playing with the market temporarily kicking the price down before it bounces back up.
as a trader i wouldn't count on it that much but if you want you can always roll the dice and place buy order(s) in that range.

it seems like this is exactly what happened. we saw a small FOMO as i predicted last week, which brought the price higher instead of letting it go back down after breaking the $10k resistance and the correction happened after going above $11k ($11250 to be exact) instead of after $10k.
the more interesting part is that the momentum is still there and if it remains this way we can see higher prices before June ends.