You DON'T need to buy 1 whole #Bitcoin for $43,000.
This is a common misunderstanding.
You can buy fractional units of Bitcoin called Satoshis (think of it like dollars and cents).
1 #BTC = 100,000,000 Satoshis.
When you go to an exchange, search for Bitcoin or BTC.
This conversion is automatic - you don't have to do anything - the exchange will do it for you.
Today, if the total 21,000,000 BTC supply was split between everyone in the world (8B people), everyone would get 0.002625 BTC or 262,500 Satoshis.
Bitcoin won't be split evenly.
Some people have thousands of BTC.
Others have none.
Today, you can buy 262,500 Satoshis for $112 USD.
As more people figure out how Bitcoin works, 0.002625 BTC will cost $250, then $500, then $1,000, etc.
You can buy as much or as little as you want at the current market price.
For example, you can buy $100/week, $10,000/month, $5/day - whatever amount you are comfortable with.
As more people understand Bitcoin, acquiring a significant amount will become much more difficult.
Most people already can't afford 1 BTC.
In 3-5 years, it will be extremely difficult to acquire 0.1 BTC (10,000,000 Satoshis are $4,300 today).
In 7-10 years, it will be extremely difficult to acquire 0.01 BTC (1,000,000 Satoshis are $430 today).
STUDY BITCOIN.