It makes me wonder what the domain name market will be like in 5-10 years. Will a 4-letter domain be impossible to acquire? 5-letter? I feel like in 5-10 years

It makes me wonder what the domain name market will be like in 5-10 years. Will a 4-letter domain be impossible to acquire? 5-letter? I feel like in 5-10 years I simply won't be able to name my product.