"Advances at Google, Intel, and several research groups indicate that computers with previously unimaginable power are finally within reach. Availability: 4-5 years"
https://www.technologyreview.com/s/603495/10-breakthrough-technologies-2017-practical-quantum-computers/
https://www.technologyreview.com/s/603495/10-breakthrough-technologies-2017-practical-quantum-computers/
Good that iota is quantum secure
It's very fascinating how people always underestimate progress. Back in late 2015 and early 2016 when we discussed this topic 90% of those who commented considered it 'overkill' and 'scifi' to take QC into consideration. Progress is cumulative, remember that everyone.