No investment is safe specially if you don't know what kind of investment/market you're into. It's never wise if you avoid investing in Bitcoin as well.
The choice of investing is individual decisions and we have time and again heard cries from people about missing out on investing on bitcoin when the price was really low and even after the last rally the market gave plenty of opportunity for anyone who wants to invest in the market and even then if someone is not able to make a wise decision to invest in bitcoin, then it is better for them to stay out rather than going at it when the market peaks and then cry out that they lost their money when the market goes down.
@ OP You cannot consider any financial market as a safe heaven as you never know what will happen and so is the case with bitcoin.
I believe that a safe depository for my money can only be that valuable product that is valued not only at the moment, but will always be valued due to its relevance and its valuable properties. Perhaps my words will provoke indignation among users of cryptocurrencies, but First of all, we are talking about gold, as a noble metal that has been valued throughout the life of mankind, and during the development of civilization it is valued even more due to its physical properties, which are used in various areas of human activity, including in high technology and in the space industry. Nevertheless, Bitcoin for me today is a very valuable investment, because I am confident in the prospects of cryptocurrency in the future, and especially in bitcoin. Nevertheless, I slightly separate these two concepts, because profitable investments and the safe storage of my funds have really different concepts for me.