From what you wrote in your OP, i can deduce that you have been buying bitcoin for many years now, we can say you are using the DCA strategy. So i think you can continue buying as you have been doing, because you have been buying at different (lower) prices, so the high price right now wouldn't really affect you and also cause bitcoin price is predicted to continue rising.
Actually I don't think if it is the right time to invest in bitcoin because the price is still very expensive and no one knows what will be the next move, I think the best thing to do right now is to wait for the price to be corrected before thinking of investing in bitcoin. of course everyone is making their own prediction, if you said Bitcoin price is predicted to continue rising I think that's in your own view. for me I have absolutely nothing to say about the movement either, but to be in the safer side I think you should hold on and wait for the price to be corrected before you should think of investing, by then I think the price will be somehow cheap for you.
There's no right time when it comes to bitcoin investment especially if you are planning on holding it for a long term, waiting for a dip to happen before you accumulate is a waste of time, what if a dip don't happen as expected will you keep waiting for it, Bitcoin has not reached half of it's growth limit so why waiting for a dip to happen before you accumulate, it is only people that don't understand or know the potential of Bitcoin that will always wait for a dip to happen before they can accumulate, the price you are seeing Bitcoin now and thinking it's expensive will grow more than that in few years to come.
There was a time when Bitcoin was $10k and a lot of people where thinking it was too expensive and because of that they refused to accumulate some said they will wait for a dip to happen before starting and that was how they never invested on it till date, now Bitcoin is $100k, and some people are still saying again that Bitcoin is too expensive and they will wait for a dip to happen before they can start accumulating and same thing will repeat it self, Bitcoin will hit $500k to $1 million and this set of people will regret there action, there's no best time for Bitcoin accumulation Start your journey today without delay.