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Today's morning, July 23, the activation BIP 91 started. Now all the blocks that do not signal support of Segregated Witness (SegWit), will be rejected.
According to xbt.eu, 97.9% of the miners support SegWit.
BIP 91 is a modified version of the BTC1 (SegWit2x), which supported a number of bitcoin-companies and mining pools, in May of 2017 signed under the relevant agreement in New York. In addition, BIP 91 is compatible with BIP 148 (UASF) - another proposal to activate the original SegWit offer, described in BIP 141.
Distributed database that is used to maintain a continuously growing list of records, called blocks.
Thus, the activation of BIP 91 also means a high probability of activation of the BTC1 protocol (SegWit2x) and the actual elimination of the risk of bitcoin hardfork due to the activation of BIP 148, which should occur on August 1.
At the same time, there is still a probability of a hardfork as a result of the increase in the block size to 2 MB, provided by SegWit2x within three months after the activation of SegWit.
BIP 91 was activated on block 477120. The next update of the level of complexity should take place on block 477792, therefore, if nothing unforeseen happens, SegWit should be fixed on 479808 (mid-August), and the direct activation of the protocol on block 481824 (end of August).
And what about Bitcoin price?
Bitcoin lost 3.15% of his price in 24 hours and now is $2729.38. Is it just a little "fall" or a harbinger of a precipitous collapse? Or Bitcoin will rise rapidly? We will see.
On the 27th of July, another Bitcoin optimization protocol signaling stage have started - BIP141.