Once they have a key, they can obtain and spend cryptocurrency. Without the key, the holder can’t spend or convert their cryptocurrency — rendering their holdings worthless unless and until the key is recovered.
It is pretty easy actually. The entire process involves five key steps. They are: a) Choose a crypto exchange; b) Create your account and verify it; c) Deposit the fund and start investing; d) Place you order to buy desired cryptocurrency, e) Select a storage method. However, there are also other ways to invest in cryptocurrencies. These include crypto ETFs (similar to those of gold and other ETFs) or investing in cryptocurrency-related stocks. These options are not so mainstream yet.

A cryptocurrency transaction is usually a rapid and straightforward process. Bitcoin, for example, can be exchanged between digital wallets using only a smartphone or computer. Public and private keys and various incentive schemes such as proof-of-work and proof-of-stake are used to safeguard these transfers. Payments in cryptocurrencies are growing more popular among large corporations and in industries such as fashion and pharmaceuticals.
Bitcoin price has been consolidating for more than ten days and shows no signs of a directional bias. BTC collected liquidity and could be primed for a move lower. For now, the altcoins are showing strength as BTC coils up. If BTC crashes, altcoins are bound to take a hit.