I think anytime is a good time to invest in Bitcoin if you have the sufficient money to invest in cryptocurrencies.
No, without the analysis and the purpose for which you are investing then it is not a good thing to do.
People now are more open to investing their fiat money or even their salaries and but cryptocurrencies when their price is low.
Fiat investments are much safer for those who don't like the risk and high volatility of bitcoin's price. Not many people can save 20-30% of their salary investing in crypto because of the risks, but they may still be able to save it for other investments like gold and others. But in the end, your money is your responsibility and only you can decide how and where it will be used regardless of whether you are interested in investing or not.