Great suggestions.
I would like to offer a bit if differentiation. You are referring to trading in the video. There is also another approach which is HODLing. Some might not be aware of the difference.
Those who think the blockchain and crypto market will be a lot higher can simply buy in and HODL. Yes you will go through ups and downs, but the attempt at timing the market is removed. This is a valid approach if one things that blockchain is a technology that will be implemented a lot more in the future.
As for the bottom finding, you nailed it. Scale in since finding it is impossible. Once you buy, it could reverse and go up...or keep going down.
Nobody can tell.
Good suggestion. Are you an all in kind of person? Buy once and forget?
Personally, I can't do it. It's not my style. I like to average myself in. Just buy gradually at intervals. I use the same tactic for bottom finding.
I am a buy and HODL. I dont go all in at once but do add as fiat allows me to. I do cost average. My STEEM purchases range from $.80 to $1.30 with one batch at $2.
My BTS ranges from $.05 to $.30.
I did that with my holdings in LTC, BTC, and ETH although I lightened up on those three a while back.
That is just my approach....I guess need to have a long term optimistic outlook about cryptocurrency and the blockchains buying into.