In the short - term, major blockchain technology upgrades or breakthroughs can cause excitement and attract new investors, leading to a price increase. For example, Ethereum's planned upgrades can boost its price as investors anticipate improved functionality. However, in the short - term, there may also be some uncertainties and market corrections as the market digests the implications. In the long - term, successful upgrades and breakthroughs can enhance the competitiveness and adoption of the related cryptocurrencies, leading to sustainable price growth and a larger market share in the overall cryptocurrency market.