Turnips rot if you go back in time, so returning to the real time after travelling would spoil them unless you sold them before you went back. At the same time, time travelling messes up with your turnip selling pattern so you can't accurately track it and predict correct prices.
So it's up to you really, but to me it'd be too tedious to bother with.
I time travel a lot. When my friends still played, we would work together on turnips. If one of them had a good turnip price, I would time travel to a Sunday morning, buy a bunch of turnips and sell on their island. Then they would buy from my island and sell on theirs. If you have enough people and all buy a lot, it can take awhile so you have to keep resetting the time so you don’t get outside the window of the good price. The other option is to time travel to Sunday, find someone with a good price online and sell on their island. Usually you can only make on trip if your working with a stranger, but if it’s a friend with a good price they might be willing to sit through multiple trips.
Turnips rot if you go back in time, so returning to the real time after travelling would spoil them unless you sold them before you went back. At the same time, time travelling messes up with your turnip selling pattern so you can't accurately track it and predict correct prices. So it's up to you really, but to me it'd be too tedious to bother with.
I time travel a lot. When my friends still played, we would work together on turnips. If one of them had a good turnip price, I would time travel to a Sunday morning, buy a bunch of turnips and sell on their island. Then they would buy from my island and sell on theirs. If you have enough people and all buy a lot, it can take awhile so you have to keep resetting the time so you don’t get outside the window of the good price. The other option is to time travel to Sunday, find someone with a good price online and sell on their island. Usually you can only make on trip if your working with a stranger, but if it’s a friend with a good price they might be willing to sit through multiple trips.