A well-maintained ASIC will typically last between 3 and 5 years, although it is not uncommon for it to last longer. If you're looking for a ballpark figure, you should assume that a GPU has at least 3 years of life. Even 10 years is not unheard of. The days when anyone could successfully mine cryptocurrencies at home on their PCs are long gone.
Whether you are mining Bitcoin, Litecoin, DASH, or a variety of other digital currencies, an Asic Miner is the most efficient method of mining crypto. An ASIC can be 100 times more efficient than GPU mining equipment and popular cryptocurrencies have ASIC farms on a network. Recently, ASICs have been released for Ethereum and large companies like Bitmain are constantly working on releasing faster and more efficient ASICs. Canaan was one of the first companies to produce ASIC miners for commercial use, and over the years has established a solid market presence and a strong reputation that demonstrates its expertise in the field of cryptocurrency mining.