My own definition of a whale are the guys that I need to pump my altcoin to the moon. I can spot many of them in polo and bittrex.
Whale is not bumper who use to do it. Actually they will be people im adoption and technically strong in blockchain and crypto coding who do the basic coding.
Try to invest on bitcoin to become a whale to bump the bitcoin price value.
Your sentence is really confusing. We are talking on what is a whale. Bumper can still be considered as term on ability of them to pump prices and theres nothing to do with those coding stuffs that you do mention. Theres no connection on it.Investing on bitcoin on smaller amounts isnt considered as whale.If you do have thousand or hundreds of thousands then you can consider to call yourself a whale.
I think depend the volume and market cap of altcoin we are trading, we can call them are a whale or just is fish or shark or dolphin haha. But if you want know what is a whale normal, they need have 100-1000 BTC if want become to whale

Yes this is up to the coin we're talking about. If we're talking about an altcoin with low volume, you can become a whale only with 5-10 bitcoin.
If we're talking about high volume altcoins, 50-100 bitcoin may not be enough.