You are right that the crypto market is volatile and perfectly timing the market is almost impossible. For example, in late 2017, the value of Bitcoin spiked to almost 20000 and then plummeted to around 3000 over the next year, giving an idea of how unpredictable these short-term movements can be. Using Dollar-Cost Averaging can help address these swings and take some of the stress of trying to buy at the "perfect" moment. That being said, trying to concentrate solely on Bitcoin does carry a degree of risk, and having a smaller portion in other reliable assets can provide an added layer of safety. The big lesson here is to invest consistently, be patient and don't fret over short term price movements.
If you are willing to invest somewhere else besides Bitcoin investment, then you can invest in real estate. If you want to invest in any other type of currency besides Bitcoin investment, then it will never be right. You can invest in real estate along with Bitcoin. Because the risk in investing in real estate is very low, for example, if you buy a flat and if you rent it out, then you will get a good amount of money from your flat at the end of the month. But you have to see where you are buying a flat. For example, if you buy a flat outside the city, it will never be profitable for you, so you have to buy a flat inside the city.
A new person will be scared, this is very normal. Because a new person has never gone through such a situation before. If a new person goes through a downturn, then he will not be so scared. With time, he will learn a lot and gain experience, but first he has to start investing.