Coincidentally it appears that most of this btc is being bought with tether indeed.
do you have any proof for this guess of yours?
because all the data we have is the trading volume of Tether and there has not been any irregular change in that. we have an increased volume which is normal in times of a price rise which you can verify by looking at the charts!
then comparing that volume with USD and other fiat volumes you can clearly see that the Tether volume is very small in comparison.
Because of the way the price went up in bits and not all at once. My theory is that they are buying little bits with pauses in between, hoping for a reaction from those who bought say in the 3-5 thousand range want to take profits so they can buy cheaper.
again, take a look at charts sometime. that is how price rises after breaking out. it is not "waiting" it is the day traders cashing out because of their panic and the trend that they have been used to. in other words for months they bought bitcoin at a certain price and sold after X% profit. now price is rising more than X% but they still panic and sell at X% or a small amount above it and that causes small corrections and slowness in the overall rise.