Given the rate at which data breaches occur (and my guess is for every one that we hear about, there were at least a dozen others that we either didn't hear about, or the people who have been hacked, haven't discovered yet), I concluded that the only really safe storage is the storage that is physically yours. I elected to go with my own cloud. I was able to pick up an essentially new 4gb 2 bay NAS (Network Attached Storage), which is run as a RAID 1. So while I only have 2tb usable, only something that physically destroys the equipment on my premises is going to result in loss. In the end all of my important data is in 3 places. If you shop around, you can pick up a reasonable sized NAS system for a whole lot less than MSRP. I found one for about 30% of MSRP that still had 30 of its 36 month warranty left.
In addition with external cloud based storage, you are limited to whatever your Internet connection speed is, and it is a very safe bet that few even have 100mbps connections, let alone 1000mbps. The slower the connection, the longer it takes to backup the data, and the longer it will take to restore.
I also cannot resist pointing out that the big cloud vendors are also the big targets for hackers. There is PR value in hacking the big guys, and it is likely there is data being stored that may actually be valuable to someone.
My NAS is connected behind a firewall/router, via Gigabit Ethernet, so both backup and restore are very fast relative to external cloud. In addition my NAS has clock. It is only accessible during hours I am likely to need it. Try to access it at 3:00AM, and you will get absolutely nothing.
I have the option of making my NAS visible to remote users. I have elected not to. No internet access and behind a firewall means you have to be connected to my in house network to see it. With WPA2 security on my wireless, it isn't going to be easy, and since I only support 802.11B/G, the wireless connection is going to be quite slow. The longer the hacker remains connected, the greater the risk of discovery.
In conclusion, my cloud storage isn't very visible, I am not a very attractive target, and there is very little that is of interest to anyone else, so I am of little interest to any hacker. So my data is pretty secure both physically, and from external threats.