They believe the crypto future will continue, now it's just the beginning. They are very interested in blockchain technology and believe that is something that will change the business world. Some of them invest their money in bitcoin
I too have friends who are so enthusiasts and believe that btc will continue to rise and we will have a bull run in coming months. So all those of your friends who know about it help them to invest in crypto and also the altcoins which you find are worthy for investing in this point of time. My friends have already invested some money in different coins.