You've made a very important point, it would be a waste of time and heartbreaking to invest for years then lose what we've been holding for years to scammers cause of our carefreeness or failure to secure our portfolio, the security of one's portfolio is as important as holding for long-term, that's another area newbies should concentrate on as well as learning to hold Bitcoin for a longer period.
Also, owning an emergency fund shouldn't be overlooked, to maintain a healthy portfolio it's very important too, emergency situations are something that's not planned, they can happen anytime which is why investors need to be very ready for a worst case scenario and there's no other way to be prepared than having the emergency fund intact.
Security is a mandatory thing to look out, I was away for a long time, but I did not stopped learning, and the most important learning was, we should never tell anyone we are holding Bitcoins, that's another thing if some scammer somehow know we are holding btc and they try to phish us we can still save us by not doing anything stupid but we can face security threats from our loved ones and people around us so never tell anyone how much btc we have, or my brother have and even my father has.
https://x.com/BitcoinNewsCom/status/1956747783530037670This news is enough to understand the sensitivity of this situation, if we tell anyone, the word will spread out like fire and it will reach to the ears of some bad people and they can do bad things to you, or anyone near you who you love and it can become a problem. Never share anyone about the bitcoin investment.
Off cause you don't need to go out and tell people you are a Bitcoin holder or investor that is insane because no one ask you but as a person, you should know your friends that are into Bitcoin investment and so whenever you guys are together and they are talking about Bitcoin and if they are traders, to some point you as a holder will come in to the talk and tell them the importance of holding Bitcoin for years and how secure and different it is from trading and if there is someone that haven't heard or doesn't have knowledge about holding for long the person may probably pick interest and I will want to know more that is life, you must not go out to preach Bitcoin to the world and the truth is whether you go out or not people will be aware of it Bitcoin because they always talk about Bitcoin on news and internet.
It is not only in Bitcoin people can plan evil against you or your family or relation there are people that are naturally wicked to the point they don't want the progress of other people and so even if it is another Investment you are doing and you are making progress they will still want to do same thing and as a prudent person one mistake you shouldn't make is telling people how much you have in your investment or how big your portfolio is.