I would have to disagree. Bitstamp recently announced support for Bitcoin Cash, and all the major exchanges have already added it. Coinbase will be adding it as well. Even if BCH use is low now, there's no reason to think that won't change in the future. 

Even with LN on the legacy chain, the 1mb block won't be enough to handle all the added transaction load from the opening and closing of LN transactions. This in itself will force the legacy chain to go to bigger blocks sooner or later. 

Also, General Bytes, one of the biggest players in the Bitcoin ATM industry, also said Bitcoin Cash will be supported on their machines: https://twitter.com/generalbytes/status/904615862291894272

General Bytes ATMs currently have 23% of the market, according to CoinATMradar statistics. 

So..... I think you made a mistake selling your BCH.