Companies are raising tens of billions of dollars, not to invest in their businesses or hire employees, but to purchase bitcoin and more obscure cryptocurrencies. A Japanese hotel operator, a French semiconductor manufacturer, a Florida toy maker, a nail-salon chain, an electric-bike maker—they’re all plowing cash into tokens, helping to send all kinds of digital currencies to record levels. News that a new company plans to buy crypto is enough to send its shares flying—spurring others to consider joining the frenzy.

Since June 1, 98 companies have announced plans to raise over $43 billion to buy bitcoin and other cryptocurrencies, according to Architect Partners, a crypto…