Bitcoin market share 57.56%, peak 97% (when blockchain first started, this had no reference value), last peak 73.61% (in January 2021). The increase in Bitcoin market share is accompanied by the start of a bull market. Undoubtedly, we are now in a bull market. A peak in market share indicates that BTC has risen nearly enough, and altcoins begin to rotate sectors, usually in the middle of a bull market. When BTC market share starts to decline, it typically indicates that we are nearing the end of the bull market.