Although you're right ViaBTC's accelerator is the real deal, there's no point doing it 5 minutes before or 10 minutes after the whole hour. You have to do it exactly at the whole hour, if you're a few seconds late, the 100 free spots are already taken.

You're still using legacy addresses, which have higher transaction fees than Segwit addresses. Please consider moving to a different wallet, for instance Electrum.

Using an online tool to verify a Letter of Guarantee is terrible for your privacy. You should use your own wallet to verify the signed message.

Can you share the site?

This explanation sounds plausible.

Thanks again for your flawless timing

Yep! I don't think there's risk in it for them though, they own the channel opening transaction.

True. But the risk is for the user: in a way the current channel is still custodial. I'll give them the benefit of the doubt though: it works just fine!

What exactly did you do to double spend it?
Did you right-click the -67.90889 transaction > Cancel (double-spend), and try to send it back to your own address with a higher fee?

For next time: enable the Coins tab in Electrum, manually select ("control") which inputs to use, then right-click "Spend".

Update: with some manual copy/pasting, I used coinb.in to create this unsigned transaction with a rediculously high fee:
I have no idea if it could work, and as a warning: you shouldn't use anyting like this without fully understanding what you're doing (I've never tested this before, don't trust me on this!). Can anyone verify this could work?

What fee do you use to broadcast the 10,000 sat transaction in the year 2030?
Can you share a raw transaction (I don't want to type the code from the image).

The paper wallet (bottom-right) looks a lot like what's being produced by a certain website that turned into a scam. Please tell me you don't use that

That's quite some inflation for the dollar.

I've used ViaBTC several times, but I can imagine they have a limit for transaction size. This is going to cost them serious money in missed fees.

That's a lot of fee! @OP: do you realize you're paying about 0.014 BTC ($800) on fees for these transactions? It's worth more than your unconfirmed input (0.009 BTC)!

Assuming you trust your friend: he should try to replace his stuck transaction that sends you 0.009 BTC. Even if he just sends one of the inputs elsewhere with a much higher fee, that would be enough to cancel all your child transactions. And even if you don't trust him, even losing the 0.009 BTC is cheaper than paying 0.014 BTC on fees.
Your friend picked the wrong moment to consolidate his small inputs, there's even a 0.00001181 BTC input, which is worth less than the fee it currently takes to move it.
And you picked the wrong unconfirmed input. If you would have (manually) selected to spend from only the confirmed (and much bigger) input in Electrum, you wouldn't have to pay this much in transaction fees. And the low-fee incoming transaction would just confirm a few weeks from now.

If your friend can't do it, maybe you can double spend 0.06790889 BTC from bc1qpyvd9nvc2k2aeep7e8zshmqzps4n2fm7m6hw8l to another address. It has RBF enabled, and will result in only a small transaction so you don't pay a fortune in fees. If this works, you'll just forget about the 0.009 BTC transaction until it confirms.

That's a terrible way to waste money $2500 on fees.

My personal expectation: Bitcoin will go up again once transaction fees drop. In 2017, Bitcoin reached it's peak when fees went crazy high. At the moment, fees aren't that high in sat, but already half way to the 2017 peak when measured in dollars.
Except for this time it's caused by some coal problem in China, which reduces hash rate. Once the difficulty drops and the power problem in China is resolved, miners will start spitting out blocks much faster, fees will drop to virtually nothing, and Bitcoin can take off again.

/just speculating here

Someday, one of them can claim being right.

Me too, I'd hate to see all user-scripts (my own and from other users) broken because of a forum upgrade. If would probably take me months to update everything, and I'd probably abandon several of my old projects.

If you disagree with moderation, you should open a topic in Meta, with clear examples of the posts you think shouldn't have been deleted.

ACINQ has been around for years. It's much more likely they try to grow and earn billions from an IPO in the future.
Opening a new LN channel is custodial in Phoenix Wallet. That means you have to wait for it to open before doing anything else.

Update: I have an open channel! It was opened (with 13 sat/vbyte) a few hours after my deposit confirmed, and a couple hours later the channel and balance became available to me. Here's the interesting part: The on-chain transaction opening the channel isn't confirmed yet! As far as I know, that's not even possible
So, and I'm slightly speculating here, this would mean ACINQ accepts LN-funds coming out of a LN-channel that's not confirmed on-chain yet. Because they're the ones who opened the channel, they can be sure it's not going to be double spent at some point and will confirm eventually. And I also expect their own hub to have confirmed channels with third parties, so third parties aren't dealing with an unconfirmed channel. So far so good, I am quite happy I don't have to wait (weeks?) for this transaction to confirm. But I'm not sure if this means the channel is now more or less custodial: if I try to close the channel, the opening transaction still has to confirm.

Update (6 days later): the transaction that opened my LN channel got confirmed. All this time I've been using Phoenix Wallet without problems.

This is new: after receiving an on-chain transaction on Phoenix Wallet, it shows a popup:
Clicking the link shows that "channel opening/closing can be slow to confirm."

Meanwhile, Phoenix doesn't show a channel being opened, it shortly showed a new channel as "closed", but that one disappeared. On-chain I can see my transaction is split up into several other transactions already, each with 12 sat/vbyte fee. This was the largest deposit I've sent into LN so far, and channel opening is custodial. I don't know if a channel was opened for me, but if it's with 12 sat/vbyte, it's going to take a while.
I'm slightly disappointed Phoenix wallet didn't show this when I created the deposit address, or just increased their fee for opening a channel.

Do you still have Electrum installed? If so, start it, see what happens.
If you don't have it anymore: did you write down 12 words (don't post them here!) as a backup?

I've never used Dogecoin Core. Bitcoin Core doesn't have the "Print paper wallets" option.

I don't know if there's a password on the paper wallet. If there is, you can't move it without the password.

It depends: if you imported the paper wallet into your wallet.dat, it holds the same key (and funds move out if you empty the paper wallet).
If your wallet.dat doesn't hold the same key, it has nothing to do with the paper wallet.

You should have the seed words for your Coinomi wallet securely stored, so that you can restore the wallet in case you lose your password.
The main risk would be your phone being compromised.