Saving only is a bad approach to wealth, money made must be reinvested somehow whether into yourself, a process, or even an asset that brings you more money in form of residual income. Tom Kiyosaki describes money as a moving object, so at every instance your money should be in motion and put into work to fetch you more money, else you're not getting wealthy anytime soon.
It cannot be said that saving is a bad approach, while it is said to be the foundation and beginning of all wealth in this world because whether it is investing, doing business or letting money work for you. The first necessary and sufficient condition you need is to have enough money.
Most of us are not born into wealthy families, we depend on the meager income from work. Where will we get enough money to invest and do business if we don't save? You don't need to save unless you are born in a rich family and your parents have enough money to support you, otherwise you need to start from zero and that is saving.
Most of us save every penny from our monthly income to invest in bitcoin but we deny the role of saving, which is unfair.