BHP is a large % of my portfolio

I inherited a big chunk of BHP shares when I was younger which sits at 81% of my portfolio. As BHP is currently priced at an ATH I'm considering selling down and reinvesting in other sectors.

I currently hold IVV ATEC AQLT(has BHP) and VAE which I would like to contribute more towards and selling down the BHP would allow this.

The dividends from BHP are very nice but considering the current price of BHP I feel it's only a matter of time before people start taking profits and BHP falls back into it's usual cycle.

Interested to hear people's opinions on whether to sell, and how much to sell, and where to re-invest.