different things. If there is no growth, then there is no appreciation in the value of stocks and bonds (the “capital”) in “capitalism.”
The only way for the value of the capital in an economy to continue to “grow” is for population to grow—unless additional value is created through technology. As of right now technology has hit the point of declining marginal returns and population is crashing.
Japan is a good example. They are suffering from deflation which really hurts the value of capital assets.