It's unwise to invest in Bitcoin with our savings because that's not the right way to go about Bitcoin investment and any investor who indulge in such practice won't last long in Bitcoin investment since there's a big possibility we will use the money meant for our expenses to invest in Bitcoin, and when it's time for us to solve our expenses, we won't have enough money to take care of our expenses and we will completely depend on our Bitcoin investment to sort ourselves out. It's always wise we invest in Bitcoin with our discretionary income so that we will always be fit to solve our expenses, and it will help us to remain in the game for a very long time.
I don't think it's a problem if someone invests in Bitcoin using their savings. Savings are essentially the money left over from the money we've already used for our needs. Therefore, savings can be considered discretionary funds, but the difference is that they've been accumulated well in advance. So, don't assume savings aren't discretionary funds; in my opinion, they are. Therefore, it's actually a good idea to convert savings into Bitcoin, as this will certainly protect them from inflation and will undoubtedly increase in value. So, the point is, don't confuse anyone with your assumptions, because you might be misunderstanding this too. Money for necessities and money for savings are two different types of funds.