Bitcoin is often accused to be completely useless but of course we know it is not true. Because Bitcoin is useful in various ways already and it will continue to be useful for many more cases when Bitcoin gets more established.
Bitcoin is not useless. If it is useless, it would be a dead coin after 13 years (since 2009). In fact, total transactions and total transaction value per second on Bitcoin network have increased significantly over time. In addition, the growth of Lightning Network in past 2 years are amazing.
A very famous usecase for Bitcoin are already donations and Bitcoin as a medium for donations is gaining more support currently.
Donation or any other activities for good or bad intention, are just part of Bitcoin use-cases.