I'm still pissed off at my friend who bought 3.5 k LSK in January (~0.15 USD/LSK) and didn't tell me about it at that time
Don't be mad, if you open your eyes and use your mind you can and will make returns even higher than that, that's about 33X ROI compared to todays' price. Not to say that's a bad return it's awesome of course but a lot of money is made in this space if you can spot the good ones early on.
It's not your friends duty to tell you about investment opportunities. I've been fortunate to have made outrageous returns and never told anyone about this except posting on this forum with my alt account, in fact it's not smart to tell anyone about your investments and their returns as this usually backfires later on in 9/10 cases
Your friend made a speculative buy and he was lucky that it paid off - nothing is guaranteed in the crypto world. Now could be another good time for buying - or price could drop much further - the tricky part is getting the timing right - I tend to buy all the way down, will never make as much money - but also will never miss out =)