You can buy a smaller amount of Cryptocurrency like 0.00022 Bitcoin which is worth 1 US dollar. Some people buy a small amount of Bitcoin to invest in Bitcoin without spending many thousands of dollars for many Bitcoins, and use the money to buy less expensive items and services on the darkweb and websites which accept Bitcoin as a method of payment.
I think some people use an online Bitcoin wallet service like Coinbase to store and trade them online, or you can store your Bitcoin offline on a hard drive, memory card, and flash drive. But, it is important to make multiple backups of your Bitcoin, so you don't lose your cryptocurrency because of data corruption, in a fire, flood, or random hard drive problem.