This isn't investment advice etc etc but there are many options that can capture large sections of the stock market without being exposed to the tech bubble (assuming there is one).

Many people say you should stay invested in the SP500 anyway and I won't argue against that. But funds like VTV, DGRO, VIG, SCHD etc don't have the same level of exposure to tech, as well as international funds like VEA. Many 401ks allow you to invest in them through brokerage "link" options. Of course, do your research or talk to a pro before considering these.