1. typing to make Bitcoin free capcha => has been very little, your computer vulnerable to viruses invade
2. Investment in the website => almost all are scams
3. gamble => this is a violation of law
Please share with me what do I do to get Bitcoin?
1. Captcha solving will just pay shit, so better not to spend your precious time on them.
2. Most of the bitcoin investment site are just scam.
3. Gambling is not a way to earn bitcoin, better only consider it as way to get some entertainment.
If you like to grow your bitcoin, try bitcoin trading. Sell when price is at peak and likely to get some correction and buy when price is stable after some dump. Also there is altcoin trading with high risk, high gain you can try it too.