Many of the most popular responses included people advising their younger selves to buy Amazon, Apple, or Microsoft stocks. "I wanted to buy $4000 of Amazon stock very early on. Husband said I was nuts and badgered me, so I didn't. Instead, we put it with the money we had saved for the down payment on a bigger house. Still kicking myself. I knew I was smarter than him," someone commented. "Imagine your future self says 'invest in Apple.' But you don’t know that is. So you pour money into orchards and become the biggest apple (small “a”) magnate in the world," another user added.

Also, apparently, many people would advise themselves to marry or not to marry a certain person. For instance, one user shared that their 3 words would be "marry that girl." Someone commented on this tweet by saying this: "Can you find her? Is she legally available? At 77, my uncle found his high school sweetheart on FB. Both sides had spouses dead over 5 years. They are having the BEST time! SO happy! Live 1000 miles apart, so airplane and visit. Look her up!!!"

One user shared that they'd rather say nothing and give their younger self a hug instead. "I’d give her a big hug because she wasn’t getting many at home and she’d been through a lot of crap in those short 18 years," the user wrote. "Never too late to be kind to yourself. I hope there are many warm, safe hugs in your life now," another user replied.

The original post by A_l_a_n__G has since gone viral and it currently has over 20k likes, almost 18k quote tweets, and over 2.5k retweets. What would your response be after hearing this question? Let us know down in the comments!