Before investing in crypto currency you must devote a lot of time to acquire knowledge, it's proper to focus on learning before you think of earning from it. Although Bitcoin investment doesn't require much learning process, this doesn't mean you shouldn't do some research about it first. Instead of pressuring people to invest in Bitcoin tell them about the importance and value of it, you can also show them how much benefit you have gotten from it. Persuading people to make any form of investment isn't really advisable, especially if they are newbies. After hodling for a period of time and it's goes through a big dip, they can blame you for the losses they are incurring.
You can actually tell them how Bitcoin investment works it is left for them to choose if they will invest or not, explain to them how volatile this Bitcoin is in nature so they won't panic or try to put blames on you when the price of Bitcoin start dropping.
And there is also no need trying to acquire all knowledge about Bitcoin before investing into Bitcoin but with your basic knowledge about Bitcoin you can get started along the line you can figure out other things about Bitcoin investment when you are already on it. Because trying to wait to get all knowledge about Bitcoin investment may lead to procastination and that is how more market opportunities is passing one bye and I don't still think it is possible to know all about Bitcoin investment.