NicoElNino / Shutterstock.com For investors looking for a passive way to bet on big tech and the ongoing artificial intelligence (AI) boom, there are ample different exchange-traded fund (ETF) products that can get the job done. Undoubtedly, there are notable differences between tech-centric ETFs. Most notably, some may be pure tech ETFs, while others may only be tech-heavy with exposure to various other sectors of the economy. In any case, investors keen on betting big on tech through an ETF should aim t ...