With really high funding rates it may be worth looking into, although when funding rates are really high that usually implies a strong trend and high volatility which is probably more important to focus on.
Do you mean if theres a strong trend in your favour then it might be worth paying the funding premium to stay in?
Yep, because you need to consider whether (given liquidity) and at what price you can rebuild your position. That is what effectively keeps most longs from closing despite high funding rates. They assume they'll just have to buy back higher.
See Bitmex funding rates vs. price in January-February this year:
https://coinalyze.net/bitcoin/usd/bitmex/funding-rate-chart/btcusd_perp_fr/There are better examples but Coinalyze only has data back to January. The point is that strong trends reinforce high funding rates because the potential price movement outweighs funding costs by so much.