Honest answer: nobody knows what the price will do tomorrow. Anyone telling you otherwise is selling you something. What you can know is whether you can afford to risk the money, and whether your timeline matches the asset.
Crypto prices can drop 50% in a few weeks. They can also double in a few months. If you'd panic and sell when it's red, this isn't for you. If you can put money in and forget about it for 2-4 years, it has historically rewarded patience much more than panic.
A simple way to start: figure out an amount you would not miss if it went to zero. Buy a little of it every week or month, no matter the price. This is called dollar-cost averaging, and it removes the "is this the right moment?" stress entirely. Over years, you end up buying at an average price across the cycle.
The wrong moments to buy are when you're emotional, when you're using money you need next month, or when a stranger online told you it's about to moon.