How old can you buy crypto?

I'm curious to know, what is the minimum age requirement for someone to purchase cryptocurrency? Is there a universal standard or does it vary depending on the country or platform? Are there any additional steps or requirements that minors must go through if they wish to invest in crypto? Also, are there any potential risks or consequences associated with minors investing in cryptocurrency that adults may not face? It would be great to get a clear understanding of the rules and regulations surrounding this topic.