If my employer is not sharing in 401K, is it still good for me to invest in it?

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If I can pay up to 4% of my gross salary to 401K plan, but my employer will not match any amount. does it still worth to go and invest? in other words, what will be the annual interest rate? if I pay $2000 for the first year, how much will my balance be for the same year?

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What if my employer will start matching after a year for example? shall I wait till the time come to match? or it is better somehow to start right away?

If my employer is not sharing in 401K, is it still good for me to invest in it?