Correct! If you're looking to hold bitcoin or any crypto for the long term then I think you shouldn't be worried about the issues that the market could face in the future because you are holding for the long term, volatility is always an issue and that's the risk but that is manageable.
If we're looking for the right time to buy, all the time is the right time but right now is the best while it's still cheap before the market recovers because that is inevitable and bitcoin has already proved it over the time.
With cryptocurrency every time is good for investment, but when we make the buy at the bearish market it'll help us make the profit at the earliest. When there exists an opportunity, make use of it. This is what said as the right time to invest. See, people who have invested when the price dropped down to $17500 will be enjoying the profits.