If you're thinking about getting into crypto, you might want to start with Bitcoin. It's the OG of the crypto world, so it might be a good place to start. Just don't expect to see huge price gains overnight - the crypto market can be volatile, so be prepared for some ups and downs. If you're interested in exploring other coins, go for it, but make sure you do your research and understand the risks before you invest.
Also you can use a small portion of that money to try and learn the market and its features with alt coins.
Missing the selling point is a common mistake in the crypto world. A lot of people assume that they could make some profit and they wait and wait and wait, and they miss the selling point assuming that it will keep going even higher and eventually it starts to crash and now they are holding a bag.
This happens more commonly than people think, I do it all the time because I hold it for years and that means no matter how many times it breaks over ATH, I will always hold it and that means I won't be profiting. I could have sold at 68k and buy now and have so much more bitcoins, even as a long term holder that would be great but it's not easy to know when that time is.