I wouldn't consider it a mistake for newbies because even after buying without emergency funds set ups you can still set that up after having at least little to your portfolio while putting yourself to order, in my opinion some of this newbies that does this are opportunity grabbers which is even better than those who wait for the perfect timing which might not come, so I prefer they buy this bitcoin being imperfect and learn about things as time goes by than try to be all perfect set up all types of funds before ever getting to buy the real deal, bitcoin usually serve us opportunities like the little dips which a newbie could see and grab yet learn the who processes as time permits.