The Monero blockchain is becoming very large, i wonder how big it will become in around 5 years time when Monero has mass adoption on the darkweb. Hardware wallets cant come soon enough either and will drive the price of XMR up high 
I think that the developers will solve this problem. The coin is very popular, but it needs to be constantly improved so that users do not switch to other similar coins. Now Monero occupies a leading position among private coins.
No worries, hardware developers are doing their thing
https://arstechnica.com/gadgets/2018/02/samsung-crams-30tb-of-ssd-into-a-single-2-5-inch-drive/