Time to be careful. On the 1-day chart above BTC.D (D for dominance) is indicated as overbought (green column). Stochastic RSI is at 99.43!! (Out of 100) that is clearly bonkers. Money Flow Index (MF) is at 100.8 (how is that possible?!). Looking left MFI has never been here before for all of the BTC dominance history.
Can BTC dominance continue to increase? Absolutely.
Is it probable? Very unlikely.