Remember that Bitcoin is very volatile in nature so you saying that Bitcoin has fallen to its lowest level is wrong because it may or can still fall below what it is now but we don't know and wether it falls again or not, long term investor who understands Bitcoin will not be weary because it won't fall forever rather once it is okay, it will pump back again and who knows if it will give us a new all time high (ATH) and I think It will definitely give us once it bounces back. Saying the condition of the market is not very good right now makes you look like a trader because an investor won't say that rather they will be happy to see this kind of opportunity to dive in and accumulate more Bitcoin and store because this is the opportunity most investors have been waiting for and any who plays with this opportunity shouldn't expect this kind of opportunity soon again.
There is no such thing, as volatile as Bitcoin is, so are other investment instruments. In the past, Bitcoin was little known, there were few investors, the price was easy to manipulate, a few people could raise or lower the price as they pleased. This is no longer the case. There are very big investors, it has a very big marketcap. It's hard to make Bitcoin more volatile now. We see 10% drops, we don't see 50%. There is no such power anymore, Bitcoin cannot drop 50% in one day. But crappy altcoins can drop even 90%. It's very risky to play with these altcoins. Trading Bitcoin has always been safer.
You are absolutely correct, it is very hard or rare to see Bitcoin drop 50% and I don't think it can ever happen unless Bitcoin has lost it potential and some altcoins don't even have potential I mean some of them or if not all depends on Bitcoin because increase in Bitcoin price will result to increase in those altcoins price and decrease in Bitcoin price will also result to decrease in those altcoins price. But I disagree with your last statement that "trading Bitcoin is always safer" that is not true because whenever you trade Bitcoin the chance of you making loss is very high perhaps the safest way to go about Bitcoin is buy investing in it ( buying and holding for a long period of time).