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Bitcoin is a decentralized digital currency and payment system built on blockchain. It is not a stock, loyalty point, or guaranteed-profit asset.

Bitcoin usually trades around the clock, but your ability to buy or sell at any moment also depends on funding, account checks, and platform rules.

Bitcoin can only reach 21 million coins because its protocol sets a hard supply cap and cuts new issuance over time through halving.

When Bitcoin reaches 21 million, the network does not stop. New coin issuance ends, and miner revenue depends more on transaction fees.

When Bitcoin reaches 21 million, new coin issuance ends, but the network keeps running and miners rely more on transaction fees.

Bitcoin is capped at 21 million coins because its issuance schedule halves over time, creating a fixed supply path that trends toward a hard limit.

What is $20 in bitcoin? It has no fixed answer. The amount depends on the live BTC price and platform fees at the time you buy.

Yes, you can invest $20 in Bitcoin. For beginners, the real focus is fees, storage, and scam prevention, not chasing fast gains.