assuming the next bull run (which definitely hasn't started) begins in the next year, the taproot fork could be already activated
- smaller signatures (64 bytes instead of 72bytes)
- script sizes will be limited to the spending path only (so to open/close LN channels will be far smaller on-chain)
- signature aggregation
That last feature will be very important to the on-chain demand you're citing as an issue. Users scraping together every last address they have to sell will use 1 signature for the whole transaction. e.g. sending 5 addresses in 1 tx to an exchange address will be 1x64 bytes, not 5x72 bytes. Exchanges will realise even better gains, they can use far more addresses for inputs than 5 in a typical payout tx.
Exchanges are also looking into the idea of using Lightning for deposits. There's a massive incentive to get that ready in time for the next bull run, anyone running an exchange without it will be at a disadvantage in the marketplace.
And segwit will likely be far more adopted by then, segwit addresses recorded on the blokchain are steadily & constantly increasing.
So don't be upset.
First of all....its very obvious the bull run has started. Bottom is gone since 5 weeks ago, bitcoin is steadily going up. It was obvious the night it shot to $5000 that the bull run has started, every passing week is just more and more confirmation of that. Bull run is on now (granted its only 5 week into probably a 2 year bull run so it is early days), which means next year things will actually start heating up, and we'll probably be in full on FOMO/mania/exponential explosion mode by in 2021. No reason to debate this, even if you don't believe it now, it will become more and more obvious to you with every passing day/week/month.
Anyway, I didn't really know what taproot does, so if it makes transactions take up less room that is very good. I guess I had read about signatures being condensed into a single one for each transaction a while back but I had forgotten what update was supposed to do that. I hope that gets implemented soon, it will certainly help somewhat.
Segwit I'm sure will be a bit more adopted in the next year or two, but after almost two years its only at what like around 40% and seems to have been holding there for the past year or so. So what maybe it's like 60% let's say in the next two years, that really doesn't do much to solve the problem. Hell even if it suddenly started jumping up and got close to 100% that doesn't do a whole lot! Segwit is a very mild tx capacity increase, only what like 2x at most. Considering its already been around 40% usage for the past year, the gains from the final 60% is a very tiny amount when taking into account the type of usage we see during later days of a bitcoin bull run. Just sayin.
Are exchanges looking to use lightning network for deposits? I haven't really heard anything about this. If so, that is good, but honestly it doesn't seem likely that option would be heavily used. LN is made to be used with lots of small transactions, like everyday purchases. People aren't gonna be putting their entire allotment of bitcoin (assuming they seriously invest in bitcoin) on the LN, which means they aren't going to throw their bitcoin on LN just to move it to an exchange for trading.
So to get people to send to exchanges via LN you need three things to happen:
1. You need the LN to actually be ready to be used by most people
2. You need most of the community to be using LN
3. and then you need them to put all their BTC that they plan to trade with, which is probably often a lot of it, onto the LN
Number 3 is unlikely because on-chain will always be more secure. LN is more like a checking account, there is very little incentive to hold more bitcoin than you need on it, because it is inherently less secure than holding directly on-chain.
Number 1 is very unlikely because the LN still has A LOT of progress to be made before it is ready to be consumed by the vast majority of people. I think on the following bull run, like in the mid-2020s, LN will be fully ready to go, but that's unlikely in the next year or two.
Number 2 is unlikely because number 1 is unlikely. It will take YEARS for a sizeable percentage of the bitcoin community to get on the LN, especially since LN isn't close to being ready for them yet. I'd put the LN being production ready (as in ready to be used by the average nontechnical person who doesn't know much of anything technical about bitcoin but owns bitcoin) at 2-3 years from now. And then a few more years before at least half active users are on it, probably 5 years before Number 2 is a possibility.
Even after number 1 and number 2 become reality in the coming years (likely after this bull run finishes up) number 3 still seems very unlikely to me. So I think it is extremely unlikely we'll see LN associated with depositing to exchanges in any meaningful amount during the current bull run over the next couple of years, or really at any point in the future unless people start to deem the LN as super safe to store the majority of your bitcoin on, which I don't see happening. I will say I hope I'm somehow wrong! Because this would indeed go a very long way to alleviating the coming onslaught of insane fees once bitcoin goes into full on FOMO mode like in 2017, since moving to exchanges is essentially the primary purpose of bitcoin still at this point in its history. But it just seems very unlikely.
I'd love to hear an argument on why it makes sense that people would move all their bitcoin to the LN (let's pretend it'll be ready for the masses in the next year or two) just to then use the LN to move it to an exchange rather than just sending it directly to the exchange. That just doesn't seem to make sense to me, as explained above. Also if you have any links that talk about exchanges planning on adding LN as an option for deposits and exchanges saying they expect it will be a popular option, I'd love to see that too, cuz I have seen nothing on this.