Crowdfunding is high risk because startups have high failure rates, the investments are generally illiquid, and external factors like economic shifts can adversely affect the business.

The four types of crowdfunding are equity crowdfunding, reward-based crowdfunding, donation-based crowdfunding, and debt crowdfunding.

Investors typically invest varying amounts in startups, with angel investors contributing between $5,000 and $150,000, and sometimes up to $250,000​​. Venture capitalists might invest larger sums, ranging from $50,000 to several million dollars, depending on the startup's stage and potential​​. Startup crowdfunding allows individuals to contribute smaller amounts, like $10 or $50, making it accessible to a broader audience. This democratizes investment and provides startups with valuable funding from numerous small backers.

A negative effect of startups crowdfunding is the potential for fraud or failure to deliver on promised products or returns, leading to financial losses for investors.