TikTok has what many Silicon Valley companies lust after: A culture-making machine beloved by 100 million Americans and deep-pocketed advertisers. That doesn’t mean they will line up to buy it. TikTok said on Wednesday that the Biden administration was pushing the company’s Chinese owners to sell the app or face a possible ban. But there are probably few companies, in the tech industry or elsewhere, willing or able to buy it, analysts and experts say. At a price of $50 billion or more — the value some analysts said TikTok…