cost free? you can try faucets but in today's time, it is not worth It. try offering your skills/service online and get paid in Bitcoin, the forum has a "service" where you can post the service you offer. you can also try building up your account's rank and join signature campaigns, they can be time-consuming though.

Show me a cost-free way to make money, and I show you a cost-free way to make bitcoins.

Free ways are faucets but faucets nowadays are not generous like years ago.

You can claim cryptocurrency, Bitcoin, Ethereum, altcoins from faucets, but it is wasteful and you can use your time to learn, find jobs, work, and get money. When you have good income, you can use it for investment.

Free lunches usually are not too much.

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I don't know your situation, but truly, a few hundred dollars can allow you to stake some coins, or arbitrage trade and gain some momentum that will snow ball.

If you're not in the US and you are ok with custodial services you can make a percentage with your holdings on the side.

Also, there would probably be lots of scam in faucet area today - so be wary and vigilant, OP, and follow the advice by acroman.

The best way out would to have a stable job + some side hustle, that would contribute to accumulating Bitcoin too.

Interestingly enough, is there a freelance platform that would pay up in BTC from the get-go?
Never thought about it.

I guess you're right but then again, the things I mentioned are probably the closest the OP can get to a "cost free" Bitcoin as he/she can earn from it without spending a lot of money.

Nothing is free, even if there is still a faucet it will not be as valuable as maybe you only get a few satoshis, but it cannot be withdrawn to your wallet.

Airdrops may be a way to earn extra income and they are still free (although some airdrops require capital) but if you work hard at researching airdrops you will find this extra way.

Now there are so many ways to earn depending on your skills, many sites provide a way to get there.

Their is no free bitcoin and if you have this understanding to know about no free bitcoin it will really help you not to fall into the hands of scammers. Many newbies have been deceived they could get free money and bitcoin and this has always been used as a strategy by scammers to get people who have this mindset. Anything that is valuable you work for it for you to gain access to it. For you to possess some bitcoin it is either you buy with your own money or you earn bitcoin by working for a service.

During the time bitcoin was created then you could get bitcoin by mining on your computer device but right now you an get it for free. No free bitcoin,  you can buy and go into a longterm investment which you will make good profit from it.