Following you, with investment it allows your money to grow and work for you, it's better to have that portion when do you have savings on your account not just a pure savings but also something that will allow you to earn while using your save money, but also it's needed to separate those two as there's always emergencies that we needed to address, split your savings that will alow you to fill your needs in case that you'll need to take of something that needed an immediate response that will affects your finances.
Agree. If we have a lot of money in our saving accounts, it is better to use some of the money for investment. If we only save the money, they will never grow and there is no chance to multiply the amount of the money. Investment is the way to get additional money in the future, it is very unfortunate if we keep all the money in saving accounts without using them for something more profitable.
However, there should be certain allocation for saving and investment. It is also not a wise decision if we use all the money for investment because investment also doesn't guarantee profits. And even some investments can be very risky, for example crypto investment. So we must be wise to choose the investment, we may need to diversify it into 2 type of investment.